Meanwhile shipping company Maersk said one of its US-flagged commercial vessels had successfully exited the Strait of Hormuz under US military protection.
President Donald Trump said he ordered U.S. forces to guide ships and crews from countries that are not involved with the Iran war out of Strait of Hormuz.
For the first time since the U.S.-Iranian cease-fire was reached in early April, the United Arab Emirates said four cruise missiles had been fired from Iran at its territory.