Nuclear Energy

A drone attack that caused a fire close to the Barakah Nuclear Energy Plant in the United Arab Emirates has raised further concerns about nuclear security and military escalation in the Gulf as discussions of peace between Iran and the United States hang in the balance.

Barakah was the first nuclear power station to be built on the Arabian Peninsula. Here is what we know about it:

What is the Barakah Nuclear Energy Plant?

Barakah is a nuclear energy plant located in Al Dhafra, the largest municipal region of the emirate of Abu Dhabi. It is the UAE’s only nuclear power plant.

Construction of the plant began in 2012, and its first reactor became commercially operational in 2021.

The plant is located close to the border with Saudi Arabia, about 225km (140 miles) west of the UAE’s capital city, Abu Dhabi.

The facility features four pressurised water reactors, the most common type of nuclear power reactor. The model used here is the advanced power reactor 1400, a pressurised water reactor design developed in South Korea. Each reactor of this type has the capacity to produce 1,400 megawatts (MW), which is enough to power roughly 1 million homes.

According to the Emirates Nuclear Energy Corporation (ENEC), the plant’s reactors produce 40 terawatt-hours (TWh) each year, which is equivalent to about 25 percent of the UAE’s electricity needs. The website for the London-based World Nuclear Association also confirmed that Barakah, when fully operational, meets 25 percent of the UAE’s electricity needs.

According to a September report by the Abu Dhabi media office, Barakah had produced 40TWh of clean energy over “the past 12 months”.

Since nuclear power plants produce a lower amount of carbon dioxide emissions than conventional power plants, the ENEC said Barakah saves up to 22.4 million tonnes of carbon emissions each year, equivalent to removing 4.8 million cars from the roads.

What happened in the attack on Sunday, and how has the UAE responded?

Authorities in Abu Dhabi said a single drone strike caused a blaze to break out at an electrical generator outside the Barakah plant’s inner perimeter in the Al Dhafra region on Sunday. No injuries were reported, and officials said radiation levels remained normal.

The UAE’s nuclear regulator said operations at the Barakah facility had not been affected. “All units are operating as normal,” it said in a social media post.

In a statement, the UAE’s Ministry of Defence said two more drones had been “successfully” intercepted and the drones had been launched from the “western border”. It did not give more details.

The UAE’s Ministry of Foreign Affairs posted a statement on X on Sunday saying the country condemned “the unprovoked terrorist attack” in “the strongest terms”.

The statement added: “The UAE emphasised that it will not tolerate any threat to its security and sovereignty under any circumstances, and that it reserves its full, sovereign, legitimate, diplomatic, and military rights to respond to any threats, allegations, or hostilities in a manner that ensures the protection of its sovereignty, national security, territorial integrity, and the safety of its citizens, residents, and visitors, in accordance with international law.”

There was no immediate claim of responsibility, and the statements by the ministries did not publicly blame any country.

But Anwar Gargash, an adviser to the UAE’s president, wrote in an X post on Sunday: “The terrorist targeting of the Barakah clean nuclear power plant, whether carried out by the principal perpetrator or through one of its agents, represents a dangerous escalation and a dark scene that violates all international laws and norms, in criminal disregard for the lives of civilians in the UAE and its surroundings.”

Gargash’s post appeared to blame Iran and its proxy network of allied armed groups in the region, which Tehran calls the “axis of resistance”.

The launch point of the drones remained unclear, but on Sunday, Saudi Arabia also reported it had intercepted three drones that had been launched from Iraq, where some Iran-allied groups operate. If Iranian Shahed-136 drones, which have an estimated range of 2,000km to 2,500km (1,240 to 1,550 miles), were fired from Iraqi territory, both Saudi Arabia and the UAE would fall well within their reach.

Other reactions

Neighbouring Gulf states Saudi Arabia and Qatar condemned the attack on the Barakah plant.

The Ministry of Foreign Affairs of Kuwait also issued a statement denouncing the attack, which it called “heinous”.

The Indian Ministry of External Affairs condemned the attack, calling it “unacceptable”, saying it represented “a dangerous escalation” and urging a return to diplomacy.

Has Iran responded to the incident?

Iran has not claimed responsibility for the drone attacks, and there has been no public statement from Iran about the incident at Barakah.

However, in the aftermath of the drone attacks, United States President Donald Trump wrote in a Truth Social post: “For Iran, the Clock is Ticking, and they better get moving, FAST, or there won’t be anything left of them. TIME IS OF THE ESSENCE!”

Iranian Ministry of Defence spokesperson Reza Talaei-Nik said on Sunday that the military is “fully prepared” to confront any new aggression from the US and Israel.

Iran has previously warned that countries where US military assets are deployed or Israeli-linked interests are located are viewed as legitimate targets.

Iran has also accused the UAE of strengthening ties with Israel while reports have emerged that Israeli Prime Minister Benjamin Netanyahu made a “secret” visit to the Gulf state during the US-Israel war on Iran. The UAE has denied this.

US Ambassador to Israel Mike Huckabee also said last week that Israel had deployed Iron Dome air defence systems and personnel to the UAE to help defend against possible Iranian attacks.

What has the IAEA said?

The International Atomic Energy Agency (IAEA), the global nuclear watchdog, said Sunday’s incident in the UAE had forced one reactor to rely temporarily on emergency diesel generators.

IAEA chief Rafael Grossi expressed “grave concern” and warned that military activity threatening nuclear facilities was “unacceptable”.

How serious could a strike on a nuclear facility be?

Attacks on nuclear power plants are especially worrying because they can risk damaging critical safety systems or reactors, which could release radioactive material into the atmosphere, not only over the country targeted but also across neighbouring states. Radiological material, specifically the hazardous isotope Caesium-137, could be released into the atmosphere.

The release of radioactive material could result in environmental contamination and poses major risks to public health. Water, if contaminated, becomes undrinkable while farmland and fisheries could become unsafe for decades, depending on the isotope released.

Short-term, acute exposure to radioactivity can cause burns and acute radiation sickness, which can be life-threatening.

Prolonged exposure, even to smaller doses, can increase the risk of illnesses such as cancer, especially thyroid cancer and leukaemia. Children and pregnant women are especially vulnerable.

Over the course of the US-Israel war on Iran, energy infrastructure has become a target.

Iran’s only functioning nuclear plant, the Bushehr power plant, has come under repeated attacks in the war. There are fears that damage at Bushehr could contaminate water across the entire Gulf region, most of which lacks groundwater and relies heavily on the desalination of seawater. Desalination plants are not specifically built to filter radioactive material, and not all plants currently are fitted with the technologies required to do so.

Iran said on Wednesday that it was reviewing a United States peace proposal that sources said would formally end the war, while leaving unresolved the key US demands that Iran suspend its nuclear programme and reopen the Strait of Hormuz.

An Iranian Foreign Ministry spokesperson quoted by Iran’s ISNA news agency said on Wednesday that Tehran would convey its response. US President Donald Trump said he believed Iran wanted an agreement.

“They want to make a deal. We’ve had very good talks over the last 24 hours, and it’s very possible that we’ll make a deal,” Trump told reporters in the Oval Office on Wednesday.

A day before, Trump paused “Project Freedom” to reopen the blockaded strait, citing progress in peace talks. The de facto blockade of the waterway threatens to cause a global recession. Iran has been pressing to keep Hormuz under its control, through which a fifth of global oil and gas supply passes.

Here is more about the US proposal to end the war, and how experts think Iran would respond.

What is the latest US proposal to end the Iran war?

US media outlet Axios said the two sides were “getting close” to an agreement on a 14-point document. Under the memorandum, Iran would agree not to develop a nuclear weapon and halt enrichment of uranium for at least 12 years, it said.

The US would lift sanctions and release billions of dollars in frozen Iranian assets, and both sides, which have imposed competing blockades in the Strait of Hormuz, would reopen the critical waterway within 30 days of signing.

Iran has been under US sanctions for decades, and the lifting of some sanctions under the 2015 nuclear agreement was reversed after Trump walked out of the landmark deal signed under his predecessor, President Barack Obama. Billions of dollars of Iranian assets remain frozen in foreign banks due to the sanctions.

It is unclear how this memorandum differs from a 14-point plan proposed by Iran last week.

The Reuters news agency reported on Thursday, citing a source briefed on the mediation, that the US negotiations were being led by Trump’s envoy Steve Witkoff and son-in-law Jared Kushner. If both sides agreed on the preliminary deal, that would start the clock on 30 days of detailed negotiations to reach a full agreement.

The full agreement would end the competing US and Iranian blockades on the strait, lift US sanctions and release frozen Iranian funds. It would also include certain curbs on Iran’s nuclear programme, which was allowed by the United Nations nuclear watchdog.

While the sources said the memorandum would not initially require concessions from either side, they did not mention several key demands Washington has made in the past, which Iran has rejected, such as curbs on Iran’s missile programme and an end to its support for armed proxy groups in the Middle East.

The sources also made no mention of Iran’s existing stockpile of more than 400kg (900lb) of near-weapons-grade uranium.

Israeli Prime Minister Benjamin Netanyahu, Trump’s ally, said on Wednesday the two leaders agreed that all enriched uranium must be removed from Iran to prevent it from developing a nuclear bomb.

The US and Israel bombed Iranian nuclear sites last June during the 12-day war, after which Trump claimed that Tehran’s nuclear programme was obliterated. A significant portion of Iran’s enriched uranium stockpile remains buried inside the bombed nuclear sites.

Tehran denies wanting to acquire a nuclear weapon. It insists its programme is for civilian purposes as allowed within its position as a signatory to the non-proliferation treaty.

Could Iran agree to this proposal?

Iran has yet to formally respond to the latest US proposal. However, Iranian leaders have pushed back against it.

Iranian lawmaker Ebrahim Rezaee, a spokesperson for the parliament’s powerful foreign policy and national security committee, described the text as “more of an American wish-list than a reality”.

Iran’s Parliament Speaker Mohammad Bagher Ghalibaf appeared to mock reports that the two sides were close, writing on social media in English that “Operation Trust Me Bro failed.”

Al Jazeera’s Resul Serdar Atas, reporting from Tehran, said on Thursday that Iran is still reviewing the US proposal, after which a response is expected to be given to the Pakistani mediators later today.

The Pakistani Ministry of Foreign Affairs said on Thursday that it welcomes the news of a potential agreement between Iran and the US, adding that it will not disclose additional information at this stage.

“As mediators, we will not lose the trust of both parties by revealing details,” it said in a statement quoted by Al Jazeera Arabic.

Atas said, “Iranians are saying that, at this stage, they’re not negotiating their nuclear programme; it’s only about ending the war on all fronts.”

He added that Tehran wants direct guarantees from the UN Security Council, a lifting of sanctions and the reopening of the Strait of Hormuz.

“If that is achieved, in a second phase, they’re ready to discuss their nuclear programme.”

Al Jazeera’s Almigdad Alruhaid reported from Tehran on Tuesday that Iran has set “a very firm red line” on the nuclear file. “The nuclear enrichment programme is non-negotiable,” he said.

According to former US Assistant Secretary of State Mark Kimmitt, Trump’s reported demand that Iran halt all uranium enrichment is unrealistic and unlikely to be accepted by Tehran.

“If there is anything the Iranians are going to insist upon in these negotiations, it is their right to enrich uranium to the 3.67 percent level, which is allowed under nuclear non-proliferation treaties,” he told Al Jazeera.

Kimmitt added that even the 2015 nuclear deal permitted Iran to continue enrichment. Iran boosted its enrichment up to 60 percent after Trump withdrew from the deal in 2018, during his first term.

However, Kimmitt postulated that Trump might want Iran’s existing stockpile of enriched uranium outside of Iran. He added that Iran might either agree to move the enriched uranium outside the country or dilute it down to a non-enriched state.

Alruhaid, the Al Jazeera correspondent, however, said Iran is resisting handing over its existing stockpile of enriched uranium.

Iran is believed to have about 440kg (970lb) of uranium enriched to 60 percent. A 90 percent threshold of enriched uranium is needed to produce a nuclear weapon.

Al Jazeera’s Alruhaid said “the sovereignty on the Strait of Hormuz is becoming one of the main issues on the negotiating table.

“We are seeing the Iranians are tightening their control. They are setting new protocol, new mechanism for controlling that strategic chokepoint for each vessel that is to pass through.”

The US allies in the Gulf, who faced the brunt of Iranian retaliatory strikes, have been pushing for the restoration of navigation in the strait without any conditions. Iran carried out attacks on the Gulf nations, mainly targeting US military assets, after the US and Israel launched attacks on it on February 28.

Trump has repeatedly played up the prospect of an agreement that would end the war, so far without success. The two sides remain at odds over a variety of difficult issues, such as Iran’s nuclear ambitions and its control of the Strait of Hormuz.

A Pakistani source and another source briefed on the mediation told Reuters that an agreement was close on a one-page memorandum that would formally end the conflict, the agency reported on Thursday.

This agreement would kick off discussions to unblock shipping through the strait, lift US sanctions on Iran and set curbs on Iran’s nuclear programme, the sources said.

Al Jazeera, however, could not confirm the veracity of the reports.

United States President Donald Trump has claimed that a new nuclear deal being negotiated with Iran will be “far better” than the 2015 Joint Comprehensive Plan of Action (JCPOA), which the US withdrew from in 2018 during his first term.

On Tuesday, Trump extended the two-week ceasefire with Iran a day before it was set to expire, with hopes for a second round of talks in Islamabad, Pakistan.

Key among the US demands is that Iran stop all enrichment of uranium.

Iran has always insisted its nuclear programme is for civilian use only, such as for power generation, which requires uranium enrichment of between 3 percent and 5 percent. To build nuclear weapons, uranium needs to be enriched to 90 percent.

In this explainer, we visualise what uranium is, how it is enriched and how long it could take Iran to make a nuclear weapon.

What is uranium, and which countries have it?

Uranium is a dense metal used as a fuel in nuclear reactors and weapons. It is naturally radioactive and usually found in low concentrations in rocks, soil and even seawater. About 90 percent of the world’s uranium is produced in just five countries: Kazakhstan, Canada, Namibia, Australia and Uzbekistan. Reserves of uranium have also been found in other countries.

Uranium is extracted either by digging it out of the ground or, more commonly, through a chemical process that dissolves uranium from within the rock.

Before it can be used as nuclear fuel, uranium is processed through several different forms, including:

• Yellowcake: Mined ore is crushed and treated with chemicals to form a coarse powder known as yellowcake, which, irrespective of its name, is usually dark green or charcoal in colour, depending on how hot it has been treated.
• Uranium tetrafluoride: Yellowcake is then treated with hydrogen fluoride gas, which turns it into emerald-green crystals known as uranium tetrafluoride or green salt.
• Uranium hexafluoride: Green salt is further fluorinated to create a solid white crystal known as uranium hexafluoride. When heated slightly, this crystal turns into a gas, making it ready for enrichment.
• Uranium dioxide: The gas is spun in a centrifuge machine, which chemically converts it into a fine, black powder.
• Fuel pellets: The black powder is pressed to form black ceramic pellets, which can then be used in a nuclear reactor.

How is uranium enriched?

Natural uranium exists in three forms, called isotopes. They are the same element, with the same number of protons but different numbers of neutrons.

Most naturally occurring uranium (99.3 percent) is U-238 – the heaviest and least radioactive – while about 0.7 percent is U-235 and trace amounts (0.005 percent) are U-234.

To generate energy, scientists separate the lighter, more radioactive U-235 from the slightly heavier U-238 in a process called uranium enrichment. U-235 can sustain a nuclear chain reaction while U-238 cannot.

To enrich uranium, it must first be converted into a gas, known as uranium hexafluoride (UF₆). This gas is fed into a series of fast-spinning cylinders called centrifuges. These cylinders spin at extremely high speeds (often more than 1,000 revolutions per second). The spinning force pushes the heavier U-238 to the outer walls, while the lighter U-235 stays in the centre and is collected.

A single centrifuge provides only a tiny amount of separation. To reach higher concentrations – or “enrichment” – the process is repeated through a series of centrifuges, called a cascade, until the desired concentration of U-235 is achieved.

What are the different levels of uranium enrichment?

The higher the U‑235 percentage, the more highly enriched the uranium is.

Small amounts (3-5 percent) are enough to fuel nuclear power reactors, while weapons require much higher enrichment levels (about 90 percent).

The International Atomic Energy Agency (IAEA) considers anything below 20 percent to be low-enriched uranium (LEU), while anything above 20 percent is considered highly-enriched uranium (HEU).

Low enriched – less than 20 percent

• Commercial grade – 3-5 percent: This is the standard fuel for the vast majority of the world’s nuclear power plants
• Small modular reactors – 5-19.9 percent: Used in more modern reactors and advanced research reactors

Highly enriched – More than 20 percent

• Research grade – 20-85 percent: Used in specialised research reactors to produce medical isotopes or to test materials
• Weapons grade – above 90 percent: This is the level required for most nuclear weapons
• Naval grade – 93-97 percent: Used in the nuclear reactors that power submarines and aircraft carriers

Depleted uranium, which contains less than 0.3 percent U‑235, is the leftover product after enrichment. It can be used for radiation shielding or as projectiles in armour‑piercing weapons.

How long does it take to enrich uranium?

The effort it takes to enrich uranium is not linear, meaning it is much more difficult to go from 0.7 percent natural uranium to 20 percent LEU than it is to go from 20 percent to 90 percent HEU. Once uranium reaches 60 percent enrichment, it becomes much quicker to reach 90 percent weapons grade.

The effort it takes to enrich uranium is measured in separative work units (SWU).

According to the IAEA, Iran is believed to have about 440kg (970lbs) of uranium enriched to 60 percent – enough to theoretically build 10 or 11 low-technology atomic bombs if refined to 90 percent.

Ted Postol, professor emeritus of science, technology and international security at the Massachusetts Institute of Technology (MIT), told Al Jazeera that before the US attack on Iran’s nuclear facility at Fordow, the country had at least 10 cascades of 174 IR-6 centrifuges in operation – meaning 1,740 IR-6 centrifuges.

The IR-6 is one of Iran’s most advanced centrifuge models. The country also has tens of thousands of older centrifuges.

Little is known about the conditions of these centrifuges or the stocks of uranium hexafluoride, which are still believed to be buried underground.

Postol has calculated that Iran’s cascade of centrifuges could produce 900 to 1,000 SWUs annually.

“Getting from natural uranium to 60 percent enrichment, which Iran has already achieved, takes roughly five years, and about 5,000 SWUs using Iran’s cascades.”

“If I want to go from 60 to 90 percent, I only need 500 SWUs. So, instead of five years, [by] starting with the 60 percent here, this might take me four or five weeks. Because I am already very enriched,” Postol said.

Using an analogy of a clock, Postol explained: “Let’s say it takes seven minutes to get 33 percent enrichment, and then eight minutes to get to 50 percent enrichment. It only takes me one minute to get to total [90 percent] enrichment.”

How easy would it be for Iran to build a nuclear weapon?

Postol said Iran’s stockpile is held underground, meaning a military strike would not necessarily eliminate the nuclear threat.

A single centrifuge cascade capable of enriching weapons-grade uranium could take up “no more floor space than a studio apartment, making it easily hidden in a small laboratory”, he said, estimating the area at 60sq metres (600sq feet).

“A single Prius Compact Hybrid car can produce enough electric power to run four or more of these cascades at a time,” Postol added, meaning “Iran can covertly convert its 60 percent uranium into weapons-grade uranium metal”.

“What they have done is put themselves in a position where anybody who thinks about attacking them with nuclear weapons has to know that they could be sitting in those tunnels after such an attack, refining [and] enriching the final step they need to build atomic weapons and converting it to metal, and building a nuclear weapon, and that they have the means to deliver it,” Postol said.

“They would have all of the technical equipment they need to build the atomic weapons. And they have the missiles, which are also in the tunnels and can be manufactured in addition to what they already have. And the atomic weapon would not need to be tested, because uranium weapons do not need to be tested before they’re used.”

What does the NPT say about enrichment?

The Treaty on the Non-Proliferation of Nuclear Weapons (NPT), established in 1968, is a landmark international agreement aimed at preventing the spread of nuclear weapons and promoting peaceful uses of nuclear energy. Iran is a signatory to this pact.

The treaty supports the right of all signatories to access nuclear technology and enrich uranium for peaceful purposes, including energy, medical or industrial purposes, with precise safeguards to ensure it is not diverted to make weapons.

Under the NPT, nuclear-weapon states agree not to transfer nuclear weapons or assist non-nuclear-weapon states in developing them. Non-nuclear-weapon states also agree not to seek or acquire nuclear weapons.

Despite this, most nuclear powers are currently modernising their arsenals rather than dismantling them.

Most of the countries are signatories, except five: India, Pakistan, Israel, South Sudan and North Korea.

What agreements has Iran made about its nuclear programme in the past?

In 2015, under the Obama administration, Iran struck a deal with six world powers — China, France, Germany, Russia, the United Kingdom and the US — plus the European Union, known as the JCPOA.

Under the pact, Tehran agreed to scale down its nuclear programme, capping enrichment to 3.67 percent, in exchange for relief from sanctions.

“The Iranians agreed to it, and they were following the treaty. There was no problem with the treaty at all, absolutely no problem,” Postol said.

“They were allowed to have 6,000 centrifuges, which, if they had natural uranium, they could probably build a bomb within a year if they were secretly using these centrifuges, but that was all under inspection. They were just simply going to enrich to 3.67 percent, which is for a power reactor. They’re allowed to do that by the Non-Proliferation Treaty.”

But in 2018, Trump pulled out of the deal, calling it “one-sided” and reimposing sanctions on Iran. Iran responded by eventually resuming enrichment at Fordow.

After the US killed Iran’s General Qassem Soleimani in January 2020, Tehran stated it would no longer follow the set uranium enrichment limits.

Former President Joe Biden made attempts to revive the deal, but it never came to fruition due to disagreements over whether sanctions should be lifted first or Iran should rejoin the JCPOA first.

Trump has repeatedly said Iran should not have the ability to produce nuclear weapons. It has been one of Washington’s red lines during talks with Iranian officials over the past year, and was also the central justification that Washington used when it bombed Iranian nuclear facilities during the 12-day US-Israel war on Iran last year.

In the current negotiations, Iran has said it is willing to “downblend” its 60 percent enriched uranium to about 20 percent – the threshold for low-enriched uranium. The process of downblending involves mixing stocks with depleted uranium to achieve a lower percentage of enriched U-235 overall.

“From the point of view of showing goodwill, I think it’s good, it shows that the Iranians are thinking of ways to address what the Americans claim are their concerns,” Postol said.

Which countries have nuclear weapons?

Nine countries possessed roughly 12,187 nuclear warheads as of early 2026, according to the Federation of American Scientists. Approximately two-thirds are owned by two nations – Russia (4,400) and the US (3,700), excluding their retired nuclear arsenals.

Some 9,745 of the total existing nuclear weapons are military stockpiles for missiles, submarines and aircraft. The rest have been retired. Of the military stockpile, 3,912 are currently deployed on missiles or at bomber bases, according to the Federation of American Scientists. Of these, some 2,100 are on US, Russian, British and French warheads, ready for use at short notice.

While Russia and the US have dismantled thousands of warheads, several countries are thought to be increasing their stockpiles, notably China.

The only country to have voluntarily relinquished nuclear weapons is South Africa. In 1989, the government halted its nuclear weapons programme and began dismantling its six nuclear weapons the following year.

Israel is believed to possess nuclear weapons, with a stockpile of at least 90. It has consistently neither confirmed nor denied this, and despite numerous treaties, it faces little international pressure for transparency.

United States President Donald Trump has said a nuclear agreement currently being negotiated with Iran will be “far better” than the 2015 Joint Comprehensive Plan of Action (JCPOA), which he withdrew from in 2018 during his first term in office.

The original 2015 accord took roughly two years of negotiations to reach and involved hundreds of specialists across technical and legal fields, including multiple US experts. Under it, Iran agreed to restrict the enrichment of uranium and to subject itself to inspections in exchange for the relaxation of sanctions.

But Trump took the US out of that pact, calling it the “worst deal ever”. Before the initial US-Israeli strikes on Iran at the end of February, the US had made new demands – including additional restrictions on Tehran’s nuclear programme, the restriction of its ballistic missiles programme and an end to its support for regional armed groups, primarily in Lebanon, Yemen and Iraq.

Trump’s latest remarks come amid growing uncertainty about whether a second round of talks will proceed in the Pakistani capital Islamabad, as a two-week ceasefire between the US-Israel and Iran approaches the end in just a day.

So, what was the JCPOA, and how did it compare to Trump’s new demands?

What was the JCPOA?

On July 14, 2015, Iran reached an agreement with the European Union and six major powers – China, France, Russia, the United Kingdom, the US, and Germany – under which these states would roll back international economic sanctions and allow Iran greater participation in the global economy.

In return, Tehran committed to limiting activities that could be used to produce a nuclear weapon.

These included reducing its stockpile of enriched uranium by about 98 percent, to less than 300kg (660lb), and capping uranium enrichment at 3.67 percent – far below weapons-grade of 90 percent, but high enough for civilian purposes such as power generation.

Before the JCPOA, Iran operated roughly 20,000 uranium-enriching centrifuges. Under the deal, that number was cut to a maximum of 6,104, and only older-generation machines confined to two facilities, which were subject to international monitoring.

Centrifuges are machines which spin to increase the concentration of the uranium-235 isotope – enrichment – in uranium, a key step towards potential bomb-making.

The deal also redesigned Iran’s Arak heavy water reactor to prevent plutonium production and introduced one of the most intrusive inspection regimes ever implemented by the global nuclear watchdog, the International Atomic Energy Agency (IAEA).

In exchange, Iran received relief from international sanctions which had severely damaged its economy. Billions of dollars in frozen assets were released, and restrictions on oil exports and banking were eased.

The deal came to halt when Trump formally withdrew Washington from the nuclear deal in 2018, a move widely criticised domestically and by foreign allies, and despite the IAEA saying Iran had complied with the agreement up to that point.

“The Iranian regime supports terrorism and exports violence, bloodshed and chaos across the Middle East. That is why we must put an end to Iran’s continued aggression and nuclear ambitions. They have not lived up to the spirit of their agreement,” he said in October 2017.

He reimposed crippling economic sanctions on Tehran as part of his “maximum pressure” tactic. These targeted Iran’s oil exports, as well as its shipping sector, banking system and other key industries.

The goal was to force Iran back to the negotiating table to agree to a new deal, which also included a discussion about Tehran’s missile capabilities, further curbs on enrichment and more scrutiny of its nuclear programme.

What has happened to Iran’s nuclear programme since the JCPOA?

During the JCPOA period, Iran’s nuclear programme was tightly constrained and heavily monitored. The IAEA repeatedly verified that Iran was complying with the deal’s terms, including one year after Trump announced the US’s withdrawal from the agreement.

Starting in mid-2019, however, Iran began incrementally breaching the deal’s limits, exceeding caps on uranium stockpiles and enrichment levels.

In November 2024, Iran said it would activate “new and advanced” centrifuges. The IAEA confirmed that Tehran had informed the nuclear watchdog that it planned to install more than 6,000 new centrifuges to enrich uranium.

In December 2024, the IAEA said Iran was rapidly enriching uranium to 60 percent purity, moving closer to the 90 percent threshold needed for weapons-grade material. Most recently, in 2025, the IAEA estimated that Iran had 440kg (970lb) of 60-percent enriched uranium.

What are Trump’s latest demands for Iran’s nuclear programme?

The US and its ally, Israel, are pushing Iran to agree to zero uranium enrichment and have accused Iran of working towards building a nuclear weapon, while providing no evidence for their claims.

They also want Iran’s estimated 440kg stock of 60pc enriched uranium to be removed from Iran. While that is below weapons-grade, it is the point at which it becomes much faster to achieve the 90 percent enrichment needed for atomic weapons production.

Iran has insisted its enrichment effort is for civilian purposes only. It is a signatory to the 1970 Treaty on the Non-Proliferation of Nuclear Weapons (NPT).

In March 2025, Tulsi Gabbard, the US director of national intelligence, testified to Congress that the US “continues to assess that Iran is not building a nuclear weapon”.

On Sunday, Iranian President Masoud Pezeshkian, in a strongly worded statement, said Trump had no right to ⁠⁠”deprive” Iran of its nuclear ⁠⁠rights.

What else is Trump asking for?

Restrictions on ballistic missiles

Before the US-Israel war on Iran began, Tehran had always insisted negotiations should be exclusively focused on Iran’s nuclear programme.

US and Israeli demands, however, extended beyond that. Just before the war began, Washington and Israel demanded severe restrictions on Iran’s ballistic missile programme.

Analysts say this demand was at least partly triggered by the fact that several Iranian missiles had breached Israel’s much-vaunted “Iron Dome” defence system during the 12-day war between the two countries in June last year. While Israel suffered only a handful of casualties, it is understood to have been alarmed.

For his part, Trump has repeatedly warned, without evidence, about the dangers of Iran’s long-range missiles, claiming Iran is producing them “in very high numbers” and they could “overwhelm the Iron Dome”.

Iran has said its right to maintain missile capabilities is non-negotiable. The JCPOA did not put any limits on the development of ballistic missiles.

However, a United Nations resolution made when adopting the nuclear agreement in July 2015 did stipulate that Iran could not “undertake any activity related to ballistic missiles designed to be capable of delivering nuclear weapons”.

Ending support for proxy groups

The US and Israel have also demanded that Iran stop supporting its non-state allies across the Middle East, including Hezbollah in Lebanon, the Houthis in Yemen and a number of groups in Iraq. Together, these groups are referred to as Iran’s “axis of resistance”.

In May last year, Trump said Tehran “must stop sponsoring terror, halt its bloody proxy wars, and permanently and verifiably cease pursuit of nuclear weapons”, during a GCC meeting in Riyadh.

Three days before the war on Iran began in February, during his State of the Union address to Congress, Trump accused Iran and “its murderous proxies” of spreading “nothing but terrorism and death and hate”.

Iran has refused to enter a dialogue about limiting its support for these armed groups.

Can Trump really get a new deal that is ‘much better’ than the JCPOA?

According to Andreas Kreig, associate professor of Security Studies at King’s College, London, Trump is more likely to secure a new deal that closely resembles the JCPOA, with “some form of restrictions on enrichment, possibly with a sunset clause, and international supervision”.

“Iran might get access to frozen assets and lifted sanctions much quicker than under the JCPOA, as it will not agree to a long drawn-out, gradual lifting of sanctions,” Krieg pointed out.

However, he warned that the political landscape in Tehran has hardened. “Iran now is a far more hardline and less pragmatic player that will play hardball at every junction. Trump cannot count on any goodwill in Tehran,” he said.

“The IRGC is now firmly in charge… with likely new powerful and tested levers such as the Strait of Hormuz,” he said, referring to the Islamic Revolutionary Guard Corps, which operates as a parallel elite military force to the army and has a great deal of political and economic power in Iran. It is a constitutionally recognised part of the Iranian military and answers directly to the supreme leader.

Overall, Krieg stressed, the US-Israel war on Iran “leaves the world worse off than had Trump stuck to the JCPOA”, even if a new compromise is eventually reached.

Moreover, since the revocation of the JCPOA, the US and Israel have waged two wars on Iran, including the current one. The 12-day war in June last year included attacks on Iran’s nuclear sites and killed more than 1,000 people.

Attacks on Iran’s nuclear infrastructure have continued since the latest war began on February 28, including on the Natanz enrichment facility, Isfahan nuclear complex, Arak heavy water reactor, and the Bushehr nuclear power plant.

Nevertheless, King’s College’s Krieg said there is still room for a negotiated outcome if Tehran and Washington scale back their demands.

“Both sides can compromise on enrichment thresholds, and on temporary moratoriums on enrichments. But Iran will not surrender its sovereignty to enrich altogether, and the Trump administration will have to meet them halfway,” he said.

“While the Iranians will commit on paper not to develop a nuclear weapon, they will want to keep R&D [research and development] in this space alive.”

Economic incentives will be central, he added. “Equally, Iran would want to get immediate access to capital and liquidity. Here, the Trump administration is already willing to compromise.”

Tehran, Iran – United States President Donald Trump’s announcements about securing major concessions from Tehran have riled supporters of the Iranian establishment, prompting rejections and clarifications from the authorities.

Several current and former senior officials, state media and the Islamic Republic’s hardcore backers expressed anger, frustration, and confusion after the US leader made a series of claims, with days left on a two-week ceasefire reached on April 8.

Trump on Friday said Iran and the US would jointly dig up the enriched uranium buried under the rubble of bombed Iranian nuclear sites, and transfer it to the US. He claimed Iran had agreed to stop enriching uranium on its soil.

He also said the Strait of Hormuz had been opened and would never be closed again, while the US naval blockade of Iran’s ports remained in place, and sea mines were removed or were in the process of being removed.

Trump also emphasised that Iran would not receive billions of dollars of its own frozen assets abroad due to US sanctions, and that the 10-day ceasefire between Israel and Lebanon was completely unrelated to Iran.

Amid Pakistan’s ongoing efforts to mediate another round of negotiations, Iran’s Parliament Speaker Mohammad Bagher Ghalibaf, who led the Iranian delegation to the Islamabad talks earlier this month, rejected all of Trump’s claims.

“With these lies, they did not win the war, and they certainly will not get anywhere in negotiations either,” he posted on X early on Saturday.

By Saturday noon, the Khatam al-Anbiya Central Headquarters of the Islamic Revolutionary Guard Corps (IRGC) released a statement, saying the Strait of Hormuz is once again heavily restricted and under “strict management” of the armed forces. It cited continued “acts of piracy and maritime theft under the so-called label of a blockade” by Washington as the reason.

‘Haze of confusion’

In the hours it took between Trump’s flurry of announcements on Friday and official responses from Iranian authorities, supporters of the establishment voiced serious concerns about any major concessions.

“Is there no Muslim out there to talk to the people a bit about what is happening?!” Ezzatollah Zarghami, a former state television chief and current member of the Supreme Cyberspace Council that controls the heavily restricted internet in Iran, wrote on X.

Alireza Zakani, the hardline mayor of Tehran, said if any of Trump’s claims are true, then the Iranian establishment must beware “not to gift the vile enemy in negotiations what it failed to achieve in the field”.

A fan account on X for Saeed Jalili, an ultrahardline member of the Supreme National Security Council who has opposed any deals with the US for decades, said “dissent” may be at play. It said Supreme Leader Mojtaba Khamenei, who has not been seen or heard from outside of several written statements attributed to him, must release a voice or video message to confirm what is happening.

Jalili’s main account distanced itself from the comment, saying the fan account – which was subsequently deleted – was a sign of “infiltration” by enemies of Iran who were trying to sow discord.

Iranian state media released another written statement attributed to Khamenei on Saturday to mark Army Day, but made no mention of the political drama unfolding hours earlier, or the negotiations with the US.

The dissonance was clearly on display on state television and other state-linked media on Friday, especially those affiliated with the IRGC.

Multiple state television hosts and analysts harshly attacked Foreign Minister Abbas Araghchi because he tweeted on Friday that the Strait of Hormuz was “declared completely open for the remaining period of ceasefire, on the coordinated route as already announced by Ports and Maritime Organisation”.

One of the hosts demanded Araghchi must immediately clarify. Another said the top diplomat’s tweet was in English, and since the Iranian people do not have access to X due to the state-imposed near-total internet shutdown for seven weeks, the message was not directed at the people.

With a huge Hezbollah flag in the background, a furious presenter on state television’s Channel 3 claimed that Araghchi was somehow “the representative of the people of Lebanon, Yemen and Iraq” because they are a part of Iran’s “axis of resistance” of armed forces, so he should demand concessions on their behalf from Trump.

Morteza Mahmoudvand, a representative for Tehran in the Iranian parliament, went as far as saying Araghchi would have been impeached had it not been for “the excuse of war”.

The Fars and Tasnim news sites, which are affiliated with the IRGC, also heavily criticised Araghchi and called for further explanations on Friday evening, with Fars arguing that “Iranian society was plunged into a haze of confusion.”

Armed supporters in the streets

Critical comments from supporters of the Iranian government also flooded social media, including local messaging applications and the comments section of state-run sites.

“We took to the streets every night with clear demands, but you shook hands with the killer of our supreme leader and handed our strait to the Zionists,” one user wrote on Friday in the local app Baleh, in reference to Israel.

“After all these years of sanctions and war and costs imposed on the people, if you are to give up the uranium and the strait, then why did you play with the people’s livelihoods and the blood of the martyrs for so long?” another user wrote.

A large number of analysts and media personalities, including Hossein Shariatmadar, the head of the Kayhan newspaper, who was appointed by late Supreme Leader Ayatollah Ali Khamenei, also voiced criticism and demanded answers on Fars and other outlets.

Regardless of whether there will be more mediated negotiations in Pakistan or whether the war will continue, Iran continues to encourage and arm backers to take to the streets to maintain control.

State media on Friday aired footage of more armed convoys moving through the streets of Tehran while waving the flags of Lebanon’s Hezbollah, Iraq’s Hashd al-Shaabi and other groups. The video below shows women and children crewing heavy machineguns mounted on the back of pick-up trucks during a rally in downtown Tehran.

With no end in sight to the state-imposed internet shutdown that has wiped out millions of jobs in Iran, in addition to steel factories and other infrastructure that were destroyed, the Iranian economy continues to suffer.

The timing of the back-and-forth between Trump and the Iranian officials meant that oil prices dropped before Western markets closed on Friday, and the Iranian currency experienced more volatility.

The rial was priced at about 1.46 million against the US dollar on Saturday morning, the first day of the working week in Iran. But it shot back up to about 1.51 million after the IRGC announced the repeated closure of the Strait of Hormuz.

A source has told Al Jazeera that Pakistan is expecting a breakthrough tied to Iran’s nuclear programme as Islamabad helps negotiate an end the US-Israeli war on Iran. Pakistani military and government officials met with Iranian and Saudi leaders on Wednesday.