Mardin Police Chief Ismet Tasan said the guns were originally donated by the U.S. military to the Iraqi police.

NPR: U.S. Weapons from Iraq Making Their Way to Turkey

In the border town of Mardin in southeastern Turkey, officers unwrapped 18 Austrian-made Glock pistols and laid them on a table.

NPR: U.S. Weapons from Iraq Making Their Way to Turkey

On Wednesday, a Turkish police officer was killed in "an armed attack on a police car, " according to the office of the governor of the southeastern province of Mardin.

CNN: Mourners in Turkey protest killings of Kurdish activists