Two Turkish citizens were wounded when gunmen opened fire on a convoy of Turkish buses carrying pilgrims in northern Syria, Turkish media reported on Monday.
Turkish NTV news channel said the driver of one of the three buses and a pilgrim were wounded in the attack at a checkpoint just across the Syrian border.
Private news agency Dogan showed images of a passenger bus with one of its side windows smashed, apparently from a gunshot, after it returned to the Turkish border town of Cizre.
A Turkish foreign ministry official said he was aware of an incident and the ministry was trying to establish the details.
Witnesses say that uniformed soldiers attacked the bus. This could certainly be someone in Assad's regime firing a shot across the bow to warn Turkey off. Or it could be rebels trying to bring Turkey in.
So does Turkey demand that Syria allow a Turkish investigation to establish those details that Ankara knows Damascus will reject?
Would NATO give Turkey a blank check over this demand?
This would certainly provide a route around that road block of United Nations Security Council approval that neither Russia nor China will allow.