It is already exactly known that Russian Su-24 bomber was shot down over the territory of Syria by a Turkish fighter. Turkish fighter at that time was also over the territory of Syria. The crew of the Su-24 did not expect the attack and was not warned. One of the pilots was killed after ejection in the air from the ground by mujahideen. The second pilot was rescued, with the support of the Syrian army.
Turks after the attack behaved like cowardly jackals. Instead of a direct dialogue with Russia, rushed to hide behind the NATO. Thus Turkey from supporting terrorists in Syria, without declaring war, moved to direct combat provocations against Russia on the side of the terrorists.
Current Russian military action against Turkey:
All contacts with Turkey on military lines will be discontinued.
All targets that represent a potential danger for the Russian forces over Syria will be downed. The corresponding order was given cruiser Moskva.
В Генштабе рассказали об ответных мерах на сбитый Турцией Су-24
Economic measures are being addressed.
I think it would be right to arm Kurds with modern air defense weapons.
Turkey is certainly more to lose from this provocation, than gain. And the benefits from this provocation are only to United States.
Video from the side of Syrian Army of downed aircraft and rescue mission.