Paramilitary police have seized about 35 pounds of uranium and arrested two Turks who they said planned to sell the weapons-grade substance, the Anatolia news agency reported Saturday.

Police, acting on a tip, stopped a taxi on a highway near the southeastern city of Sanliurfa, Anatolia said. They found the uranium in a secret compartment under one of the car seats.

Police in Sanliurfa confirmed the arrests but refused to give further information.

Anatolia said the uranium was enriched for use in weapons. Police believe it was smuggled from an eastern European country.

The agency did not say when the arrests were made. Sanliurfa, some 480 miles from Ankara, is close to the Syrian border.