The sources said the first pilot was killed by opposition forces who shot at him as he landed after ejecting from the plane.
One Russian pilot of a warplane downed by Turkey over northern Syria today was killed and the second is missing, rebel and opposition activist sources told AFP.
The sources said the first pilot was killed by opposition forces who shot at him as he landed after ejecting from the plane.
Several videos circulating online and shared on opposition social media sites purported to show the dead pilot surrounded by rebels from different factions.
Fadi Ahmed, a spokesman for the First Coastal Front rebel group, said "the Russian pilot was killed by gunfire as he fell with his parachute" in the Jabal Turkman area of Latakia province.
"The 10th Brigade (rebel group) transferred the body of the dead Russian to the local rebel joint operations room," added Omar Jablawi, a media activist working with rebels in the area.
He declined to specify exactly where the joint operations room was located.
The sources said rebels were still searching for the second Russian pilot of the Su-24 aircraft, which Ankara said was downed by Turkish forces.
Online, opposition and rebel accounts on Twitter and Facebook circulated several videos depicting from several angles the man said to be the dead Russian pilot.
In them, a man can been seen in military uniform with straps across his chest and blood on his face.
Rebels refer to the man as a "Russian pilot" and "Russian pig", but the location of the footage was not specified and it was impossible to verify the videos.