Iran Declares Strait of Hormuz Closed Amid Escalating Tensions with US

Iran’s Islamic Revolutionary Guard Corps (IRGC) has declared the Strait of Hormuz closed “until further notice” and until the “end of US interference in this region,” following an incident in which Iranian forces struck a commercial vessel they claimed was using an unauthorized route.

The announcement has triggered fresh concerns over global energy supplies, as the narrow waterway between the Persian Gulf and the Gulf of Oman handles roughly one-fifth of the world’s oil and liquefied natural gas shipments under normal conditions.

This marks the latest flare-up in a volatile cycle that began with US and Israeli strikes on Iran in late February 2026. Iran initially restricted or effectively closed the strait in response, leading to attacks on commercial shipping, a US naval blockade, stranded vessels, and partial reopenings under fragile interim agreements.

According to Iranian state media and IRGC statements, forces fired warning shots that hit a vessel reported as a Cyprus-flagged container ship, possibly the MV GFS Galaxy or similar traveling without permission.

Iran described the action as necessary to enforce maritime security and its claimed control over approved routes. A second vessel was reportedly disabled.

The US Central Command (CENTCOM) has strongly contested Iran’s claims, stating that the strait remains open, traffic continues (with dozens of transits reported in recent periods), and Iran does not control the waterway.

CENTCOM conducted retaliatory strikes on over 140 Iranian military targets to “degrade Iran’s ability to attack civilian mariners and commercial vessels.”

Iran has responded with missile and drone attacks on US facilities and interests in Gulf states, including targets in Qatar, Bahrain, Kuwait, and Oman, prompting alerts and condemnations from those nations.

Market and Shipping Impact
• Oil prices have spiked, with Brent crude rising toward or above $79 per barrel amid the uncertainty.

• Shipping data shows reduced transits compared to pre-conflict levels (normally 120+ vessels daily), though exact current figures vary by source and US officials maintain some movement persists.

• Hundreds to thousands of seafarers remain affected by earlier disruptions, with UN evacuation efforts previously paused due to similar incidents.

International Reactions
• The US has emphasized freedom of navigation and monitoring the situation.

• Regional players like Oman, Qatar, and others have expressed concerns and called for calm.

• Broader peace talks, already tenuous following a memorandum of understanding, face new setbacks.

Analysts view the strait as Iran’s key leverage in negotiations over sanctions, nuclear issues, and regional influence. Control and potential transit fees remain major sticking points.

This situation is developing rapidly.

Markets are volatile, diplomatic efforts continue behind the scenes, and naval forces from multiple sides are on high alert, as further escalation risks broader economic fallout and threats to global energy security.