Anadolu Agency says the attack today targeted a checkpoint some 50 meters away from a police station in the town of Cizre, in Sirnak province. It said the blast caused severe damage to the police station.
Militants of the Kurdistan Workers' Party, or PKK, have carried out a string of car bomb attacks on police and military in recent months.
Violence between the PKK and the security forces resumed last year, after the collapse of a fragile peace process.