Iran's IRGC formally closes the Strait of Hormuz after US strikes hit six Iranian cities; Iran fires on Bahrain, Jordan, Kuwait and Qatar

Summary

Iran's IRGC declared the Strait of Hormuz closed to all shipping on July 12, hours after fresh US airstrikes hit Iranian port cities including Bandar Abbas, Sirik, Chabahar, Qeshm Island, Bushehr and Asaluyeh. Iran simultaneously launched strikes on Bahrain, Jordan, Kuwait and Qatar. The closure came after the US Saturday deadline expired without compliance; Iranian Foreign Minister Abbas Araghchi had met Omani officials in Muscat the previous day without reaching a deal. Iran's new Supreme Leader Mojtaba Khamenei had meanwhile vowed "inevitable revenge" for his father's killing. Traffic on the vital waterway had already slowed ahead of the formal announcement.

Why it matters

The Strait of Hormuz is one of the world's most critical oil transit chokepoints. A formal IRGC closure declaration, rather than attacks on individual vessels, marks a significant escalation. Iran's simultaneous strikes on Bahrain, Kuwait and Qatar, Gulf states with close US security ties, bring the conflict into the territory of US partners and raise the risk of a broader regional confrontation. Prior IRGC strikes had already tested those limits.

What to watch

• Whether the US and Gulf allies treat the formal closure as requiring a military response or attempt to reopen Oman diplomacy
• Iran's follow-through: whether the IRGC physically blocks transiting vessels or the closure remains a legal and political declaration
• Bahrain's response, given its hosting of the US Fifth Fleet
• Oil market reaction as the closure's duration and enforcement become clearer