Turkey said on Sunday that Syria had shot down its military aircraft in international airspace on Friday without warning and declared it would formally consult with NATO allies on a response.

Turkish Foreign Minister Ahmet Davutoglu, speaking some 48 hours after the plane was shot down near the sea borders of both countries, told state broadcaster TRT the plane had been clearly marked as Turkish and dismissed Syria's earlier statement it had not known the plane belonged to Turkey.

"Our plane shortly violated Syrian airspace, but not when it was shot down," Davutoglu said, adding that Syria had not issued a warning to Turkey before the shooting.