Iran Claims a Third Tanker Has Hit a Mine in the Strait of Hormuz — and Warns Ships Sailing Dark Will “Face a Firm Response”

Iran’s Islamic Revolutionary Guard Corps Navy said late Sunday that another oil tanker has struck a naval mine in the Strait of Hormuz, the third such claim in four days — and this time Tehran added an explicit threat: ships sailing with their tracking systems switched off, it warned, will “face a firm response.”

According to the IRGC Navy statement, reported by the semi-official Fars News Agency, the explosion tore into the vessel’s engine room as it attempted to leave the strategic waterway via what Tehran considers an unauthorised southern route. The blast triggered a severe fire, Iran’s ISNA news agency reported. The vessel had switched off its positioning and navigation systems from the very start of its voyage, the Guards said, and was violating what it described as maritime regulations governing passage through the strait.

As with the two previous incidents, the IRGC did not name the vessel, disclose its flag or ownership, or say whether there were any casualties. And as with the two previous incidents, the claim has not been independently verified. Reuters reported that Iranian state media described tankers catching fire after mine strikes but noted the reports had not been independently confirmed.

Three strikes, four days

The latest claim extends a pattern that began last week. On Friday, the IRGC Navy said a tanker hit a mine in the strait, triggering an explosion and fire — the first claimed strike. On Saturday morning, it announced a second: a supertanker carrying more than two million barrels of crude oil that the Guards said struck a mine on an “unauthorised” route, with the explosion hitting the engine room and leaving the vessel unable to move. Both vessels were unidentified; both claims unverified.

Washington has rejected Tehran’s entire premise. US Central Command says the strait is open to international shipping and that Iran’s transit restrictions are illegitimate — “It is open, it is available for transit,” CENTCOM spokesperson Navy Captain Tim Hawkins told Fox News Digital, adding that roughly 97 per cent of ships attempting to cross the strait have done so without being hit by an Iranian projectile.

The strait itself has become a battlefield of competing facts. The UK Maritime Trade Operations agency has separately logged a string of attacks on commercial vessels in and around the waterway, including a tanker off Saudi Arabia’s Al Jubayl port that the agency said was attacked with a rocket-propelled grenade fired from a small boat on Friday. That report was independent of Iran’s claims — and illustrated how dangerous the world’s busiest oil corridor has become.

Why this matters

The Strait of Hormuz carries about a fifth of the world’s oil consumption through a channel barely 30 kilometres wide at its narrowest point. Three claimed mine strikes in four days — alongside the RPG attack, an earlier mine dispute, and a week that UKMTO logged 135 incidents in the strait since the US-Israeli war on Iran began on February 28 — push the waterway closer to the kind of shutdown that energy markets have feared since February. Brent crude, already above $108, has been moving on every headline.

Iran’s new warning is the sharpest escalation signal yet. By framing the strikes as enforcement of rules it imposed when it tightened its grip on the strait, and by vowing a “firm response” against ships that sail dark, Tehran is effectively telling the world’s tanker fleet: ask our permission or risk a mine. The US and its regional allies answer that freedom of navigation is not Tehran’s to grant. Somewhere between those two positions, 17 million barrels a day keep moving — or stop.

Foreign Minister Abbas Araghchi has said Tehran’s seven-day plan to reopen the strait remains on the table, conditional on a halt to hostilities. Whether the third mine claim makes that deal more urgent or more impossible is the question markets, insurers, and navies will be asking this week.