here are reports - unconfirmed - that a Russian pilot has been killed.

According to English-language newspaper, Today's Zaman, a CNN Turk reporter in Yayladağ, a helicopter was seen above the scene of the crash.

Opposition fighters are accused of preventing the aircraft from picking up the pilots.

CNN Turk is reporting that one of the pilots has been captured by Turkmen forces in Syria. The news agency said the fighters were searching for a second pilot. Unconfirmed reports circulating on social media have suggested that he might be dead.