ISLAMABAD (AP) — The latest ceasefire talks between the United States and Iran appeared to fail Saturday before they began, as Tehran’s top diplomat left Pakistan and President Donald Trump soon afterward said he had told envoys not to travel to Islamabad.

The negotiations were meant to follow historic face-to-face talks earlier this month between the U.S., led by Vice President JD Vance, and Iran, led by parliament speaker Mohammad Bagher Qalibaf. But Iranian officials have questioned how they can trust the U.S. after its forces started blockading Iranian ports in response to Iran’s war grip on the Strait of Hormuz waterway.

“If they want to talk, all they have to do is call!!!” Trump said on social media, adding: “Too much time wasted on traveling, too much work!” The White House on Friday said Steve Witkoff and Jared Kushner would be going to Islamabad.

Iran’s Foreign Minister Abbas Araghchi left Islamabad on Saturday evening, two Pakistani officials told The Associated Press, speaking on condition of anonymity because they were not authorized to talk to the media.

“Shared Iran’s position concerning workable framework to permanently end the war on Iran. Have yet to see if the U.S. is truly serious about diplomacy,” Araghchi later said on social media.