A blaze broke out on board the Kharg during a training exercise near the port of Jask, Iranian news agencies have reported.
The entire crew were able to safely disembark the huge vessel before firefighters battled to tackle the fire.
The Fars news agency reported: “All efforts to save the vessel were unsuccessful and it sank.”
The statement said efforts to extinguish the flames continued on the huge ship, which was near the Iranian port of Jask situated on the Gulf of Oman at the time of the disaster.
But the cause of the fire has not yet been revealed.
This is a breaking story. More to follow…