Loud explosions rang out across Iranian cities bordering the Strait of Hormuz on Monday as US forces confirmed self-defence strikes on missile sites and IRGC vessels, on the very day oil markets had rallied on hopes of a diplomatic breakthrough in Doha.
The first sign that all was not quiet came with reports of loud explosions in and around Bandar Abbas, Sirik and Jask, three Iranian cities that sit along the northern edge of the strait. The cause was initially unknown, and markets, which had spent much of the session rallying on news of progress in Doha, were slow to respond.
Early unconfirmed reports described an exchange of fire between US and Iranian forces, with an IRGC vessel reportedly targeting a ship at sea believed to be a US vessel. US fighter jets were reported to have responded by striking IRGC small boats operating in the Gulf. Runway damage was also reported at Bandar Abbas airport, a facility with both civilian and military significance given its position at the mouth of the strait.
The situation clarified when US Central Command confirmed, via Fox News, that American forces had carried out self-defence strikes in southern Iran. The targets included missile launch sites and Iranian boats that had been attempting to lay mines in the waterway. CENTCOM stated it had destroyed two IRGC vessels laying sea mines in the Strait of Hormuz and struck a surface-to-air missile site at Bandar Abbas.
US forces would exercise restraint given the ongoing ceasefire framework, framing the action as defensive rather than escalatory. — US Central Command
The restraint framing is notable but does not fully contain the implications. Mine-laying activity by the IRGC, if it reflects a deliberate policy rather than a rogue operation, suggests that elements within Iran’s security apparatus are not operating in alignment with the negotiating track running through Doha. That gap between the diplomatic and military chains of command is precisely the kind of complication that has caused previous rounds of talks to collapse.
The day’s events present a difficult read for energy markets. The nearly 7% oil price decline recorded during the session was premised on the prospect of the strait reopening. The strikes, the mine-laying attempt, and the infrastructure damage at Bandar Abbas all point in the opposite direction, reinforcing the view that any normalisation of oil flows through the strait remains months away at best.
What began as a day of cautious diplomatic optimism ended with confirmed US military action on Iranian soil, as a sequence of events across several hours laid bare the fragility of the ceasefire. Negotiations and kinetic conflict are now running in parallel, and any risk premium that oil markets had begun to unwind on ceasefire optimism must now be reassessed.
Mine-laying activity in the Gulf, if confirmed as a pattern, raises the prospect of deliberate strait interdiction continuing even under a nominal ceasefire framework. The combination of runway damage at Bandar Abbas airport and attacks on missile launch sites points to escalation in a strategically critical corridor, with direct implications for the timeline of any oil flow normalisation.
