Iran formally suspended all negotiations through mediators with the United States at 09:56 on Monday 1 June, citing Israel's continuing strikes in Lebanon as a ceasefire breach. Foreign Minister Abbas Araghchi posted that "a violation on one front is a violation of the ceasefire on all fronts", the Foreign Ministry line relayed through the IRGC-affiliated Tasnim news agency, an outlet tied to the Islamic Revolutionary Guard Corps (IRGC), Iran's ideological military branch1. Tehran acted through a formal diplomatic channel rather than a statement, and that act forced Trump to phone Netanyahu and halt Israel's Beirut strikes four hours later.
Speaker Mohammad Bagher Ghalibaf accused Washington of breaching the MOU, the unsigned Iran-US Memorandum of Understanding, through its naval blockade, hardening a pre-refusal of ratification he had issued the same morning. IRGC Major General Mohsen Rezaei went further: "the strait of Hormuz is under Iran's control. We will not allow the naval blockade to continue"2. At 10:04 Tasnim authorised activating "other fronts including the Bab el-Mandeb strait", the Red Sea chokepoint between Yemen and the Horn of Africa through which roughly 6% of global oil trade passes.
Tehran authorised the second front but has not yet acted on it. No vessel has been interdicted at Bab el-Mandeb in this wave, and the Yemen-based Houthis have not formally moved3. Khamenei's office, not parliament, controls the IRGC and the nuclear file, which is why a Tasnim release carries the weight a ministry podium would not, and why the suspension could be ordered and reversed inside a day without institutional friction.
