The commander of the Turkish navy has not been heard from since the failed coup.
Several Turkish navy ships are still unaccounted for, their commanders suspected to be among the plotters who sought to overthrow President Recep Tayyip Erdogan.
Admiral Veysel Kosele, the commander of the Turkish navy, has not been heard from since the failed coup on Friday, a source told The Times.
It is currently unknown whether he was part of the coup or was tricked on to the boat after coup plotters told him there was a terrorist attack and then taken hostage, local media reports suggested.