Iranian state media said that US President Donald Trump “claimed to have sent a letter to the Leader of the Islamic Revolution on negotiations with the Islamic Republic.”

Iranian state media immediately picked up on Trump's acknowledgment, given in excerpts from a Fox Business News interview aired on Friday, though there was no confirmation from Khamenei's office that any letter had been received.

Trump’s remarks represent a shift for the president, who in 2018 withdrew the United States from a nuclear deal with Iran.

Qatar's prime minister has warned that an attack on Iran's nuclear facilities would "entirely contaminate" the waters of the Gulf and threaten life in Qatar, the UAE and Kuwait.

Iran's supreme leader Ayatollah Ali Khamenei on Saturday slammed what he described as bullying tactics a day after US President Donald Trump threatened military action against Iran."Some bully governments -- I really don't know of any more appropriate term for some foreign figures and leaders than the word bullying -- insist on negotiations,

An Israeli attack on Iran remains a possibility even though Trump has said he prefers diplomacy. Iranian forces are on a high level of alert after previous Israeli strikes damaged their air defenses. Any attack on Iran's heavily concealed nuclear program would be far from guaranteed of success.

Flight data indicates that a U.S. Navy MQ-4C Triton reconnaissance drone spent 12 hours operating near Iran's southern border.