Biden’s decision comes after Iran launched the attack over a suspected Israeli strike on its embassy compound in Syria on April 1.

The reported declaration came in a phone call between the leaders late on Sunday as Israel mulls its response to Iran’s air attack the previous day. Despite the US president joining global calls for restraint, the rising tensions in the Middle East appear to be set to accelerate approval of a stalled funding package that would see Washington hand Netanyahu $14bn in aid.

“We believe Israel has freedom of action to protect itself and defend itself … That’s a longstanding policy and that remains, but no, we would not envision ourselves participating in such a thing,” a senior US administration official said on Sunday.

The Iranian attack, which came in response to a strike – as yet unclaimed by Israel – on Iran’s embassy in Syria on April 1, saw more than 300 missiles and drones launched towards Israel. However, it caused only modest damage, with most shot down by Israel, with help from the US, the United Kingdom, France and Jordan.

Israel’s five-member war cabinet, which met on Sunday evening, is reported to favour retaliation. However, division over the timing and scale of any response is said to persist.

In a statement issued late on Saturday, Biden said he had told Netanyahu that Israel had “demonstrated a remarkable capacity to defend against and defeat even unprecedented attacks”. However, he did not reveal if Israel’s response was discussed.

John Kirby, the White House’s top national security spokesperson, sought to set out the US position clearly in an interview on the NBC channel on Sunday.

“Our commitment is ironclad” to defending Israel and to “helping Israel defend itself”, he said, before adding: “As the president has said many times, we don’t seek a wider war in the region. We don’t seek a war with Iran.”

Tough neighbourhood

However, the escalation of the low-level conflict that has been bubbling through Israel’s six-month bombardment of Gaza appears set to see US lawmakers push through a funding package that has been stalled.

Following a new plea from Biden, Republican lawmaker and House Speaker Mike Johnson said on Sunday that he will try to advance the $95bn package of wartime aid for US allies.

Johnson has been key in holding up approval of the national security package, which would hand $14bn to Israel and about $60bn to Ukraine, as well as sending funds to allies in Asia.

Johnson told Fox News Channel’s Sunday Morning Futures that he and Republicans “understand the necessity of standing with Israel” and he would try this week to advance the aid.

“The details of that package are being put together right now,” he said. “We’re looking at the options and all these supplemental issues.”

Johnson is already under immense political pressure amid the Republican Party’s divided support for helping Kyiv defend itself from Russia’s invasion.

Kirby called on the speaker to put that package “on the floor as soon as possible”.

“We didn’t need any reminders in terms of what’s going on in Ukraine,” Kirby said. “But [Saturday night’s Iranian attack] certainly underscores significantly the threat that Israel faces in a very, very tough neighbourhood.”