Iran: IRGC Navy Says Fourth Oil Tanker Hit Mine and Exploded in Strait of Hormuz The IRGC Navy said the supertanker, carrying more than 2 million barrels of crude oil, ignored its radio warnings and tried to exit the strait's unauthorized southern lane. The tanker is on fire. The Revolutionary Guards' navy said it was the fourth tanker to burn in the Strait since the early hours of the day, blaming the fires on American instigation.