A fragile ceasefire in the Middle East has completely disintegrated. Over the weekend of July 11–12, 2026, Iran’s Islamic Revolutionary Guard Corps (IRGC) announced the total closure of the strategic Strait of Hormuz “until further notice.” The declaration followed a dramatic naval engagement in which Iranian forces targeted a commercial container ship with an anti-ship cruise missile.
The announcement came hours after Iran’s Islamic Revolutionary Guard Corps (IRGC) said it fired a naval cruise missile at a commercial vessel accused of using an unauthorised route through the strategic waterway.
According to the BBC, the IRGC said the vessel was hit with warning fire and forced to stop after ignoring repeated instructions to change course. Iranian authorities did not name the vessel or its flag, but said the action was taken to enforce maritime security in Iranian waters.
Shortly after the incident, state media reported that Iran had “closed” the Strait of Hormuz, one of the world’s most critical oil transit chokepoints. About 20% of the world’s oil and gas shipments pass through the narrow channel daily. The closure is expected to have immediate effects on global energy markets and shipping routes.
In a separate development, Iranian forces also launched fresh missile and drone strikes on US bases in the Middle East. Details on the locations, casualties, and extent of damage were not immediately released by Tehran. US officials have not yet commented on the attacks.
The dual actions, the closure of the strait and strikes on US positions represent Iran’s most direct response yet to ongoing regional tensions and previous military actions involving US and allied forces.
The maritime blockade immediately triggered a massive military response from the United States, followed by fresh Iranian ballistic missile strikes on U.S. bases in the region marking the most severe escalation since the outbreak of hostilities earlier this year.
The Strait of Hormuz lies between Iran and Oman and connects the Persian Gulf to the Gulf of Oman and the Arabian Sea. Any prolonged closure could disrupt global oil supplies and trigger a spike in crude prices.
International shipping authorities and oil companies are expected to reroute vessels and assess security risks in the coming hours. The UN Security Council is also likely to hold an emergency session as world leaders call for de-escalation.
