An official says Kurdish militants have killed two police officers in the southern city of Adana.

Gov. Mustafa Buyuk said Tuesday that assailants riding a motorcycle fired on a police vehicle before fleeing the scene. One officer was killed in the attack late Monday, the second died of his wounds in hospital.

Separately, four people were injured late Monday after Kurdish rebels fired a rocket at a military convoy on a highway in southeast Turkey, the state-run Anadolu Agency reported.

Around 150 police and soldiers have died since July in renewed violence between the Kurdistan Workers' Party, or PKK, and the Turkish security forces. Turkish officials say hundreds of PKK rebels have been killed in operations. The fighting has shattering a fragile peace process with the Kurds.