Iran on Saturday (June 20, 2026) said that it closed the Strait of Hormuz because of Israel's attacks in Lebanon and warned that while negotiators were going to Switzerland for talks with the United States on their interim agreement, not much likely will happen if the fighting doesn't stop.

U.S. President Donald Trump, in response, threatened to impose U.S. tolls in the crucial waterway if a final deal with Iran isn't reached in 60 days, saying the money would be for “services rendered as the Guardian Angel to the countries of the Middle East”. His social media post underscored that the agreement calls for toll-free travel for 60 days.

The announcements indicated a rough start to technical-level U.S.-Iran talks that key mediator Pakistan said will begin Sunday (June 21, 2026), with Qatari mediators also participating.

Iran's joint military command said the strait was closed because of the U.S.’ “clear breach of its commitments” by failing to end the war. The interim deal is meant to stop fighting on all fronts.

Shortly after that, Iran's state broadcaster said that the negotiating team was leaving for Switzerland, a trip delayed from Friday.

State media said that the team includes parliamentary Speaker Mohammad Bagher Qalibaf, Foreign Minister Abbas Araghchi and central bank and oil officials, among others. The deal calls for Iran's assets to be unfrozen.

The US. .disputed Iran's announcement on the strait.

“Iran does not control the Strait of Hormuz. Traffic continues to flow, and US forces are monitoring the situation to ensure this remains the case,” said Capt Tim Hawkins, a spokesperson for US Central Command.

The military said that 55 merchant ships transited Saturday with more than 17 million barrels of oil.