Supreme Leader Ayatollah Ali Khamenei said on Wednesday Iran should further develop its military, including its missiles, after U.S. President Donald Trump made threats of force against Tehran if it refused to negotiate over its nuclear programme.

TEMPO.CO, Jakarta - Supreme Leader of Iran Ayatollah Ali Khamenei has called for the country to further develop its military capabilities after U.S. President Donald Trump threatened to use force if Tehran does not engage in negotiations regarding its nuclear program, Al Jazeera reported.

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.