Iran’s top diplomat has dismissed direct negotiations with the United States as pointless, after US President Donald Trump said he preferred face-to-face talks over its nuclear programme.

Trump sent a letter to Iran’s supreme leader Ayatollah Ali Khamenei last month calling for negotiations but warning of military action if diplomacy failed.

On Thursday, the US president said he favoured “direct talks”, arguing they were “faster” and offered a better understanding than going through intermediaries.

But Iranian Foreign Minister Abbas Araghchi said direct talks made no sense with a country “that constantly threatens to resort to force in violation of the UN Charter and that expresses contradictory positions from its various officials”.

On Saturday, Iranian President Masoud Pezeshkian said his country was willing to engage in dialogue with the United States on an “equal footing”.