Watch breaking news coverage as the U.S. conducts a new round of military airstrikes targeting Iranian air defense systems and IRGC boats around the Strait of Hormuz.

​A commercial tanker is struck in the Strait of Hormuz amid a sharp military escalation as the US and Iran exchange retaliatory strikes, threatening their fragile interim peace agreement.

A U.S. official confirms an Iranian drone struck a commercial vessel in the Strait of Hormuz, escalating maritime security concerns in a vital global shipping lane. Read the full update and follow ABC News for live coverage.