The Emirati Ministry of Defense said in multiple May 4 statements that the United Arab Emirates' air defense systems were engaging with Iranian missiles and drones, which appear to have caused a fire at an oil facility in Fujairah. Meanwhile, U.S. Adm. Bradley Cooper told reporters that multiple U.S. destroyers had transited the Strait of Hormuz and were operating in the Persian Gulf, adding that Iran had opened fire on U.S. warships and commercial vessels and that the U.S. military had sunk six small Iranian boats that were targeting vessels in the Strait of Hormuz and surrounding waters.