As the war enters its 804th day, these are the main developments.

Fighting

• One person was killed and four injured by Russian artillery fire in the eastern border region of Sumy, which has come under increasing aerial bombardment in recent weeks. Ukrainian police said Moscow’s forces had fired on the territory 224 times over the previous 24 hours.
• Five people were injured after Ukraine hit an oil storage depot in the Russian-occupied city of Luhansk triggering a large fire.

Politics and diplomacy

• The Security Service of Ukraine (SBU) said it uncovered a Russian plot to assassinate Ukrainian President Volodymyr Zelenskyy and other senior officials. The SBU said Russia’s Federal Security Service (FSB) had set up a network of agents to carry out the plan and two colonels in the State Guard of Ukraine, which provides protection to top officials, had been arrested on suspicion of treason.
• Vladimir Putin was sworn in for a fifth term as Russian president in a Kremlin ceremony boycotted by the United States, the United Kingdom and several European Union countries. In a speech to mark the occasion, Putin said the country would emerge victorious and stronger from a “difficult” period.
• Several dozen protesters gathered outside The Hague’s Peace Palace to protest against Putin’s inauguration, calling for him to stand trial. The International Criminal Court issued arrest warrants for Putin and Russian Children’s Commissioner Maria Lvova-Belova on war crime charges related to the abduction of Ukrainian children in March 2023.
• Chinese President Xi Jinping left France after a two-day trip during which he offered no major concessions on foreign policy, even as President Emmanuel Macron urged him to use his influence on Russia to help end the war in Ukraine.
• Zelenskyy said the island state of Cape Verde had become the first African country to agree to attend next month’s “peace summit” in Switzerland. Bern has invited 160 delegations to the event which is scheduled for June 15-16.
• Russia banned the US-based non-profit Freedom House, labelling it an “undesirable” organisation in Russia. In its 2024 Freedom in the World report, Freedom House assessed Russia as “not free”, noting restrictions on political rights and civil liberties had tightened since Moscow launched its full-scale invasion of Ukraine.

Weapons

• Ukrainian state prosecutors told the Reuters news agency they had examined debris from 21 of about 50 North Korean ballistic missiles launched by Russia between late December and late February, as they work to assess the threat from Moscow’s cooperation with Pyongyang. The prosecutors’ office said evidence so far suggested a high failure rate.

• Speaking during a visit to the US, Romanian President Klaus Iohannis said he was open to discussions on sending a Patriot missile system to Ukraine. Romania signed a $4bn deal to procure Patriots in 2017, with the first shipment delivered in 2020.
• The Organisation for the Prohibition of Chemical Weapons (OPCW) said Russia and Ukraine each accused the other of using banned toxins on the battlefield in meetings in The Hague. The OPCW said the accusations were “insufficiently substantiated” but the situation remained “volatile and extremely concerning regarding the possible re-emergence of use of toxic chemicals as weapons”.