Supreme Leader Khamenei responds after US president said he had sent letter to Tehran seeking new round of talks.

Comments come after Trump says there will be 'some interesting days ahead with Iran' as 'we are down to the final moments -- we can’t let them have a nuclear weapon'

Meanwhile, Iran’s mission to the United Nations said refused to receive any such letter from US President Donald Trump pressing for talks on preventing the development of nuclear weapons.

Iran denies receiving letter from US President Donald Trump, but dismissed prospects of nuclear negotiations so long as Washington sanctions on Tehran remain in place.

President Donald Trump said Friday that he is seeking a new agreement with Iran to curb the country’s nuclear program, warning ominously of a conflict if a deal can’t be reached. The president earlier told Fox News that he sent a letter to Ali Khamenei,

Iran has not yet received a letter from the USA proposing negotiations regarding its nuclear programme, as reported by Iran's representation at the UN. Previously, the Iranian news agency, associated with the Supreme National Security Council,

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

President Donald Trump said he wants to negotiate a nuclear deal with Iran and sent a letter to its leadership this week suggesting talks with the Islamic Republic, which the West fears is rapidly nearing the capability to make atomic weapons.

President Donald Trump said he's “strongly considering” sanctions and tariffs on Russia in hopes of forcing a settlement to the war in Ukraine