Iran reasserts its right to control shipping in Strait of Hormuz after ship hit near Oman

What Happened

On Friday, Tehran reasserted its right to control shipping through the Strait of Hormuz and warned Gulf states against siding with the United States, a day after an attack on a vessel near Oman underscored the fragility of the interim deal halting the Iran war. Deputy Foreign Minister Kazem Gharibabadi stated that safe passage cannot be guaranteed without Iran's role as a coastal state, while Iranian state TV reported that the Islamic Revolutionary Guard Corps (IRGC) turned back three foreign tankers for 'unauthorized passage'—a claim not independently verified. Separately, Taiwan's Evergreen Marine said its Singapore-flagged ship Ever Lovely was hit by an 'unknown object' near Oman on Thursday; two US officials told Reuters that Iran had fired on the ship. Iran's Persian Gulf Strait Authority warned that passage via unauthorized routes would be at the owner’s risk. The incident follows Iran’s effective takeover of the strait after US-Israeli strikes on February 28, which disrupted global oil flows and heightened regional tensions.

Key Actors

Why It Matters

The Strait of Hormuz is a vital chokepoint for roughly one-fifth of global oil and LNG supplies. Iran's post-February 28 de facto control disrupts maritime traffic, rattles energy markets, and tests the interim ceasefire between Iran and the US. Tehran's open reassertion of authority and the reported IRGC enforcement actions escalate the risk of miscalculation or direct confrontation, potentially drawing in Gulf states and re-igniting broader hostilities. It also complicates the fragile diplomatic track, including the 60-day negotiation window on Iran’s nuclear program and other disputes.

Watch For

Monitor whether Iran formalizes tolls or expands interdiction in the strait, and any US military or diplomatic response, including potential re-escalation of strikes. Watch for further incidents involving commercial vessels and communication from the UKMTO or shipping companies. Track progress in the 60-day talks on nuclear inspections, financial incentives, and the Israel-Lebanon ceasefire, which Iran ties to the overall deal. Oil price movements and rerouting of tankers will indicate market sensitivity to perceived risk.