Iran’s Supreme Leader Ayatollah Ali Khamenei has called for the country to further develop its military capabilities after United States President Donald Trump threatened to use force if Tehran does not negotiate on its nuclear programme.

Though Iran has long denied nuclear weapon ambitions, it is "dramatically" accelerating its enrichment of uranium to 60% fissile purity, close to the roughly 90% weapons-grade level, the U.N. nuclear watchdog chief told Reuters in December.

Iran's Supreme Leader Ayatollah Ali Khamenei on Wednesday said Iran should further strengthen its military power, including its missiles, after US President Donald Trump made threats against

Iran’s Supreme Leader Ayatollah Ali Khamenei said talks with the US would be “unwise and dishonorable” after President Donald Trump said he wanted a new nuclear deal with the Islamic Republic.

Iran alerted the United Nations on Tuesday to what it described as "reckless and inflammatory statements" by U.S. President Donald Trump threatening the use of force, and warned that "any act of aggression will have severe consequences.

Israeli officials have repeatedly signaled that military action against Iran's nuclear program remains an option. Trump, however, has emphasized diplomacy over mi