Turkey has said its warplanes have shot down an unidentified aircraft which intruded into its airspace near the border with Syria.
Media reports quote officials as saying the aircraft was a drone. There are no further details so far, according to BBC News.
The Syrian government is known to be operating drones, as do the US-led coalition against Islamic State and Russia.
More than two million Syrians have fled to Turkey in four years of conflict.
The Turkish military said the unknown aircraft detected near the border had been warned three times before it was shot down “in accordance with rules of engagement”.
Earlier this month Turkey accused Russian jets – which have recently joined the air battle against Syrian rebel group – of violating its airspace.
The intrusions also drew condemnation from NATO.