Russian President Vladimir Putin told his US counterpart Donald Trump Saturday that Moscow was ready to hold a fresh round of peace talks with Kyiv after June 22, once the sides complete exchanging prisoners and soldiers' bodies.

Ukraine's leader Volodymyr Zelensky meanwhile did not mention whether Ukraine would agree to the next round of talks, only saying that "the exchanges will be completed and the parties will discuss the next step."

Iranians and Israelis woke to smoke and rubble on Sunday after the arch-rivals expanded their attacks overnight, with Israel striking Tehran's defence ministry, and Iran unleashing a deadly barrage of missiles.

Air raid sirens and explosions were heard by AFP journalists in Jerusalem and Tel Aviv early Sunday, as Israel's military said millions of Israelis were "running for shelter" around the country.

Israel's emergency services said at least eight people, including children, were killed in the overnight strikes, and around 200 were wounded.

Pro-Palestinian student protest leader Mahmoud Khalil remained in US detention Friday despite an expected release, his lawyer said, following reported accusations of inaccuracies in his permanent residency application.

US District Judge Michael Fabiarz had issued an order Wednesday that the government could not detain or deport Khalil, a legal permanent resident, based on Secretary of State Marco Rubio's assertions that his presence on US soil posed a national security threat.

The order gave the government until Friday to release Khalil.

An Afghan man pleaded guilty on Friday to plotting to carry out an attack on US election day on behalf of the Islamic State (IS) group, the Justice Department said.

Nasir Ahmad Tawhedi, 27, was arrested in the central US state of Oklahoma in October, several weeks before the November 5 presidential election.

He pleaded guilty in a federal court in Oklahoma City to charges of conspiring to provide material support to IS and attempting to receive firearms and ammunition to carry out an attack.

The son of Iran's late shah appealed Friday to the country's security forces to abandon the cleric-run state, voicing hope for toppling the Islamic republic after Israel launched military strikes.

Reza Pahlavi blamed Supreme Leader Ayatollah Ali Khamenei for having "dragged Iran into a war" with Israel and described the government in Tehran as "weak and divided."

"It could fall. As I have told my compatriots: Iran is yours and yours to reclaim. I am with you. Stay strong and we will win," he said in a statement.

Israel's firefighting service said its teams were responding to several "major" incidents resulting from an Iranian missile attack, including efforts to rescue people trapped in a high-rise building.

"Firefighting crews are handling several major incidents, mainly in the Dan region" around Tel Aviv, a statement said, adding that "firefighters are working in a high-rise building to rescue trapped individuals and extinguish a fire, as well as responding to two additional destruction sites."

For President Donald Trump, few goals on the world stage have been more explicit -- he will not drag the United States into another "forever war."

Yet Israel's massive strikes on Iran will test that promise as never before, potentially setting up a showdown with his base as Trump decides how much support the United States will offer.

Trump had publicly called for Israel not to strike as he sought a negotiated solution, and his roving envoy Steve Witkoff had been scheduled to meet Iranian officials for the sixth time Sunday.

Israeli Prime Minister Benjamin Netanyahu's nearly 20-year-old threat to strike Iran came true on Friday, as US President Donald Trump warned Tehran of further "brutal" attacks if it refuses to negotiate.

In its largest military action against Iran to date, Israel's strikes hit about 100 targets including nuclear facilities and military command centres, and killed the armed forces' chief, top nuclear scientists and other senior figures.

Establishment Republicans have backed Israel's strikes on Iran, but the crisis is forcing President Donald Trump to walk a political tightrope between the hawks in his base and the isolationists who helped sweep him to power.

Trump ran for reelection as a peacemaker who distained the foreign adventures of his predecessors, boasting that he would have little difficulty ending conflicts in the Middle East and Ukraine.

The timing of Israel's plan to attack Iran was top secret. But Washington pizza delivery trackers guessed something was up before the first bombs fell.

About an hour before Iranian state TV first reported loud explosions in Tehran, pizza orders around the Pentagon went through the roof, according to a viral X account claiming to offer "hot intel" on "late-night activity spikes" at the US military headquarters.