The US and Iran failed to reach a peace deal at their historic 21-hour talks in Pakistan, leaving the fate of a tenuous two-week ceasefire in doubt, with both sides attempting to hold each other responsible for the collapse of the negotiations.

Vice President JD Vance, who led the US delegation at the negotiations in Islamabad, said the Iranian side did not accept Washington’s terms for ending the war even as the US presented its “final and best offer”. He indicated that Tehran’s reluctance to abandon its nuclear programme was one of the key sticking points.