Abbas Araghchi had left Pakistan’s capital late Saturday, creating confusion around an expected second round of talks, but he returned to Islamabad before continuing on to Moscow, Iranian state media said. He had been in Oman, which previously mediated talks and is located on the other side of the strategic Strait of Hormuz.

Two Pakistani officials, speaking on condition of anonymity to discuss the efforts, did not say when the Americans might return to the region to follow up on historic face-to-face talks earlier this month.

The White House on Friday said it would dispatch envoys Steve Witkoff and Jared Kushner to Islamabad for a second round of talks. But shortly after Araghchi’s departure was reported, President Donald Trump said he had called off the mission because of a lack of progress with Iran. “They can call us anytime they want,” he said.

Trump last week indefinitely extended the ceasefire that U.S. and Iran agreed to on April 7 that has largely halted the fighting that began with joint U.S.-Israeli strikes on Feb. 28. But a permanent settlement remains elusive in the war that has killed thousands of people and shaken the global economy.

Strait of Hormuz at center of Iran’s discussions in Oman

A standoff remains at the Strait of Hormuz, a vital global waterway, as Iran restricts movement through it and the U.S. enforces a blockade of Iranian ports.

Iran wants to persuade Oman to support a mechanism to collect tolls from vessels passing through the strait, through which a fifth of the world’s oil flows in peacetime, according to a regional official who spoke on condition of anonymity because he was not authorized to discuss the matter.

The official, who is involved in mediation efforts, said Iran insists on ending the U.S. blockade before a new round of talks and that Pakistan-led mediators are trying to bridge significant gaps between the countries.

He added that Araghchi’s talks in Oman have focused on issues surrounding Strait of Hormuz.

Oman’s response wasn’t immediately clear. Araghchi also spoke by phone with counterparts in Qatar and Saudi Arabia on Sunday.

Even before Saturday’s developments, Iran’s foreign ministry said any talks would be indirect and Pakistani officials would act as go-betweens, reflecting Tehran’s wariness after rounds of indirect talks last year and earlier this year ended with Iran being attacked by the U.S. and Israel.

Trump said Iran has offered ‘much better’ proposal

The economic fallout is growing two months into the war as global shipments of oil, liquefied natural gas, fertilizer and other supplies are disrupted by the near-closure of the Strait of Hormuz.

Both sides have continued to make military threats. Iran’s joint military command on Saturday warned that “if the U.S. continues its aggressive military actions, including naval blockades, banditry, and piracy” it will face a “strong response.” Trump last week ordered the military to “shoot and kill” small boats that could be placing mines.

Trump told journalists on Saturday, before a security incident at the White House Correspondents’ Dinner, that within 10 minutes of him canceling Witkoff and Kushner’s trip to Islamabad, Iran sent a “much better” proposal.

He did not elaborate but stressed that one of his conditions is that Iran “will not have a nuclear weapon.” The status of Iran’s enriched uraniumhas long been at the center of tensions. Tehran has 440 kilograms (972 pounds) of uranium enriched to 60% purity, a short, technical step from weapons-grade levels, according to the U.N. nuclear watchdog agency.

Syed Mohammad Ali, an independent political analyst in Pakistan, said the delay in the talks must not be seen as a setback and that indirect talks were progressing. He said tensions between Washington and Tehran cannot be eased overnight and the negotiation process requires patience.

“But the good thing is that the ceasefire is holding, and both sides have a desire to end the conflict in a way that does not backfire at home,” Ali said.

A growing toll even as fragile ceasefires hold

Since the war began, at least 3,375 people have been killed in Iran and at least 2,496 people in Lebanon, where the Israel-Hezbollah fighting resumed two days after the Iran war started.

Also, 23 people have been killed in Israel and more than a dozen in Gulf Arab states. Fifteen Israeli soldiers in Lebanon, 13 U.S. service members in the region and six U.N. peacekeepers in southern Lebanon have been killed.

Another ceasefire — between Israel and the Iranian-backed Lebanese militant Hezbollah group, has been extended by three weeks. Hezbollah has not participated in the Washington-brokered diplomacy.