ISIS said Thursday that it has executed at least 250 Syrian soldiers at an air base in the northeastern city of Raqqa.
The group said on one of its official websites that it killed the soldiers Wednesday. It also claimed to have killed 600 government soldiers in the fight for the al Tabqa air base since Aug. 19.
The Syrian Observatory for Human Rights, meanwhile, reported that 200 Syrian soldiers and 346 ISIS fighters died in the fight for the air base. Hundreds more were wounded, the London-based activist group said.
ISIS claims that the video shows Syrian soldiers being paraded through the desert in their underwear. Another video posted by Syrian activists purportedly shows bodies lined up on the ground.