Witkoff restated Trump's previous commitment to "zero enrichment" by Tehran in any future deal. "There have been some very hard red lines drawn," he said.

Tehran has denied it seeks nuclear weapons and said it was willing to accept some curbs in exchange for sanctions relief.

The US and its European allies believe Iran could be moving closer to building a nuclear weapon. Tehran denies this.

Iran-US Crisis Live: Tensions between Washington and US are on the rise. Former CIA officer John Kiriakou has claimed that a final decision regarding a military strike has been reached. Follow our live coverage for the latest updates.

DONALD TRUMP does not get it. On February 21st Steve Witkoff, his envoy to the Middle East and elsewhere, told Fox News that the president cannot understand why Iran has not “capitulated” to America’s demands over its nuclear programme,

US envoy Steve Witkoff said Trump was ’curious’ why Iran hadn’t ’capitulated’ given the multiple warnings the US president has issued over a nuclear deal.

US envoy Steve Witkoff warns Iran could be a week from producing bomb-grade uranium, despite past strikes. Washington remains concerned about Tehran's nuclear ambitions, with US President Donald Trump demanding "zero enrichment" but reportedly considering limited,

Steve Witkoff and Jared Kushner held negotiations aimed at securing a nuclear deal with Iran and an end to Russia’s war in Ukraine