President Donald Trump says he sent a letter to Iran’s Ayatollah Ali Khamenei, a development that was not immediately confirmed by the supreme leader.

Supreme Leader Ayatollah Khamenei has issued a warning to "bullying" Western powers and their calls for negotiations.

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.”

Iran's Supreme leader has criticised "bullying" countries in an apparent response to Donald Trump's comments that he had sent a letter to Iran demanding negotiations on its nuclear programme. Trump said on Friday he had warned Tehran in a letter it could face military action unless it agreed to talks for a nuclear deal.

US President Donald Trump claimed that focus on climate change is a misplaced priority, asserting that the world should be more worried about nuclear weapons. He also expressed his intent to restart nuclear arms control dialogue with China and Russia.

Iran's Supreme Leader Ayatollah Ali Khamenei has shut down Trump's offer for talks on a nuclear deal and said a "bullying government" was being persistent.

Iranian officials have stated that they still haven't received any correspondence from President Donald Trump regarding negations.

Iran's Supreme Leader Ayatollah Ali Khamenei has shut down Donald Trump's offer to initiate talks on a nuclear deal, describing the US as a "bullying government."It comes a day after Trump said he sent a letter to Khamenei,

"There are two ways Iran can be handled, militarily or you make a deal. I would prefer to make a deal," Trump told Fox host Maria Bartiromo.

In a new TV interview, Trump discussed the key topics taking center stage since his return to the White House.

Iran said Monday it would not negotiate under "intimidation", after US President Donald Trump sought to ratchet up pressure on Tehran by ending a sanctions waiver that had allowed Iraq