An explosion has caused a fire on an Iranian tanker near the coast of Saudi Arabia, Iranian media say.
The vessel, from Iran's national oil company (NIOC), was 60 miles (97km) from the Saudi port of Jeddah.
The ship's two main storage tanks are said to have been damaged, causing an oil spill in the Red Sea, but no-one was reportedly injured.
Iran's foreign ministry claimed the vessel had been "targeted twice" but did not provide further details.
On Friday morning, an unnamed source told Iran media the vessel was struck by missiles "probably" originating from Saudi Arabia.
But the NIOC later denied the claim. It said two separate explosions took place aboard the ship that were "probably" caused by missiles.
The explosion is yet to be independently verified, and details of the tanker itself are unclear. Iranian state TV earlier identified it as the Sinopa, but the NIOC later said it was another vessel named Sabiti.