Two Turkish soldiers were killed when their military helicopter crashed, the Turkish General Staff said on Saturday.
Turkish President Recep Tayyip Erdogan earlier confirmed the downing of the helicopter, according to Turkish media. "A little earlier, one of our helicopters was shot down," he told reporters, adding that those who are responsible for the incident would pay a "heavier price."
The president, however, did not specify who was responsible for the attack.
Damascus has firmly condemned the operation as an assault on Syria's sovereignty. Moscow, in turn, has urged all the parties to exercise restraint and called for respect for Syria's territorial integrity.