Grossi has - though slowly - demanded answers from Iran to explain illicit nuclear materials and refusing to accept partial answers that he called "not credible."

Trump's 60-day deadline for a nuclear deal has passed. Sunday's Oman talks may be the last chance to avoid conflict.

Between enrichment disputes and demands for sanctions relief, Tehran is expected to send Washington a counter offer to its nuclear proposal

Iran’s nuclear program remains a top focus for inspectors from the International Atomic Energy Agency, particularly as any possible deal between Tehran and the United States over the program would likely rely on the agency long known as the United Nations’ nuclear watchdog.

Iranian President Masoud Pezeshkian affirmed Wednesday that his country will not yield to “American arrogance” regarding its nuclear program. Speaking to the official IRNA news agency, Pezeshkian said negotiations with the US and Europe over the nuclear file are ongoing.

A spokesperson for the dissident MeK group told Newsweek of "a more advanced" alleged Iranian nuclear weapons program.

Iran says it has no plans to build a nuclear weapon and is only interested in power generation and other peaceful projects. During his first White House term, Trump withdrew the U.S. from a 2015 deal between Iran and world powers that placed limits on Tehran's disputed nuclear activities in exchange for sanctions relief.

Iran for days had been saying there would be talks, but Oman, which is serving as the mediator, had not confirmed them until now.

At Gala, US envoy Steve Witkoff vows unwavering support for Israel, denounces Iran’s nuclear ambitions, and affirms commitment to bringing hostages home.