According to another article it was an Airbus A320.
From the RT article above:
"So far, there are no grounds to claim that the aircraft became a target of a missile attack, experts say.
It was flying over a mountainous area in Syria when one of the pilots noticed flashes on the ground. After that, to keep safe, it was decided to increase the height of the flight, Irina Tyurina, a spokeswoman for Russian Union of Tourist Industry told RIA Novosti.