Host nation Pakistan said on Tuesday there was still no confirmation that Iran would attend last-ditch peace talks with the United States, after US forces boarded a huge Iranian oil tanker at sea with just a day left to the ceasefire.
President Donald Trump said he hoped to reach a "great deal" to end the US-Israeli war on Iran, but he did not want to extend the ceasefire, and the US military was "raring to go" if negotiations were not successful.
Vice President JD Vance, due to lead the US delegation, had yet to board a flight for Islamabad, where the centre of the city has been locked down and a luxury hotel has been cleared out to host the talks.
A White House official said Vance would be participating on Tuesday in additional policy meetings at the White House.
"Formal response from Iranian side about confirmation of delegation to attend Islamabad Peace Talks is still awaited," Pakistan's information minister, Attaullah Tarar, said in a post on X. "Pakistan as the mediator is in constant touch with Iranians and pursuing the path of diplomacy and dialogue."