A plane exploded in the air and the fireball fell on a Turkmen mountain on the Syrian side of the border, CNN-Turk and NTV televisions reported.
A Turkish government official told AFP: "We are tying to identify the nationality of the plane."
Russia today said that the military plane Turkey shot down at the Syrian border was a Russian Sukhoi Su-24 jet, adding that the jet did not enter Turkish space.
"Presumably as a result of firing, an Su-24 plane of the Russian forces crashed in the Syrian Arab Republic," Russian news agencies quoted the defence ministry as saying. The ministry said the fate of the pilots was not yet clear.