Iran stops negotiations with U.S., vows to ‘completely’ block Strait of Hormuz –Oil prices leapt more than 7% higher following Tasnim’s report | 1 June 2026 | Iranian negotiators will stop exchanging messages with the U.S. through intermediaries, and Tehran will move to fully close the Strait of Hormuz, in retaliation for ongoing ceasefire violations, Iran’s state-affiliated news outlet Tasnim said Monday. The report, in a translated post on the social media site Telegram, homes in on Israel’s military operations in Lebanon against the Iran-backed militia Hezbollah. “No dialogue will take place” until Israel fully withdraws from occupied areas in Lebanon and stops all attacks in both Lebanon and Gaza, per Tasnim. “Also, the resistance front and Iran have resolved to completely block the Strait of Hormuz and activate other fronts including the Bab al-Mandeb Strait, in order to punish the Zionists and their supporters,” the report said.