Greek investigators were to question Monday a Syrian caught trying to sneak tens of thousands of bullets into Turkey, a police source said.

The 28-year-old man was detained over the weekend at the Kipi customs post in Evros, the northernmost part of Greece, after police found parcels of bullets concealed in special caches in his car, reports AFP.

The authorities said they were not ruling out the possibility that the ammunition was destined to rebels of the Free Syrian Army.

The suspect’s vehicle had Austrian registration plates but he was carrying a fake British driving license, police said.

Evros is a central hub on the route connecting Europe and Asia, where smugglers routinely attempt to pass guns, drugs and migrants, from or into Turkey, which shares 1,300 kilometers (800 miles) of border with Iraq and Syria and has been a key point of influx for jihadists.