The source said the waterway ​would ​also ⁠remain closed until ​waivers allowing ​the ⁠sale of Iranian oil ⁠were ​issued.

Hormuz, Lebanon remain flashpoints

Pointing to what it called ​Israeli “crimes” in Lebanon that violated US commitments to a ceasefire, the IRGC warned ships would be at risk if they approached the Strait, a vital conduit for global oil and gas supplies.

But US ​Central Command said 55 merchant ships transited the strait on Saturday with more than 17 million barrels of oil for global markets.

US forces will ensure commercial traffic ⁠continues, Central Command said.

Trump said no toll would be charged for passage through the strait during or after the 60-day ceasefire — unless the US imposes one should peace talks fail.

In a social media post, he cited ​the possibility of a toll levied by the United States “for services rendered as the Guardian Angel to the countries of the Middle East” if a peace deal is not completed.

Mohammad Mokhber, an adviser to Iran’s supreme leader, Ayatollah ​Mojtaba Khamenei, accused the US on X of failing to implement the first clause of its 14-point interim deal with Iran, which includes a ceasefire “on all fronts”, including Lebanon.

He said that, as long as the agreement was only on paper, the flow of Middle East energy would remain halted.

The Lebanon truce appeared fragile as Israeli forces and the anti-Israel group Hezbollah attacked each other.

The Iranian delegation is led by chief negotiator Mohammad Baqer Qalibaf and includes Foreign Minister Abbas Araghchi as well as senior security, central bank ​and oil officials, Iranian media said.

In addition to Vance, the US negotiating team includes envoys Steve Witkoff and Jared Kushner, Trump’s son-in-law.

Iranian Foreign Ministry spokesperson Esmaeil Baghaei said Iran would press in Switzerland for fulfilment of ​commitments, citing past failures by the other side to honour agreements.

Vance, in an interview with Fox ‌News, said ⁠he was confident the ceasefire would hold and that he had seen no evidence that the Strait of Hormuz was closed.

The US vice president left for Switzerland shortly after 4 pm ET on Saturday.

Negotiators would likely have a “couple of days of talks“, he told reporters before boarding a plane at Joint Base Andrews in Maryland.

“I think we’re going to hopefully make progress on the nuclear issue, make progress on the Lebanon ceasefire issue,” he said.