Iran’s supreme leader has criticized an initial proposal from the United States in negotiations over Tehran’s rapidly advancing nuclear program.

The fighting between Israel and Iran intensified on Monday night, as both nations kept up their attacks, killing civilians and raising concern among world leaders that the biggest battle between old enemies could lead to a broad regional conflict.

High-level talks between the United States and Iran over Tehran's nuclear ... and could be achieved rapidly," Araghchi said. Iran's Supreme Leader Ayatollah Ali Khamenei waves during the 36th ...

Iranian missiles damaged the US embassy in Tel Aviv, escalating tensions. Israel retaliated with strikes on Iran's energy sector, while both sides continued attacks.

Iran warns it will strike all US bases in the region if nuclear talks fail, as tensions rise over missiles and uranium enrichment ahead of the next negotiation round in Oman.

US President Donald Trump told Israeli Prime Minister Benjamin Netanyahu to end the war in Gaza and stop talk of an attack on Iran, according to a source familiar with the conversation.

President Donald Trump has warned Iran the U.S. would retaliate to an attack by Tehran with its "full strength and might" as Israel and Iran launched fresh strikes overnight. On Friday, Israel launched the first of a series of airstrikes across Iran,