Turkish forces launched a hunt for the attackers, believed to be members of the banned separatist Kurdistan Workers Party (PKK).
Ankara blames the PKK for more than 30,000 deaths since 1984.
Iraq's Kurdish Region
KURDISH AWAKENING: The ethnic Kurdish region in the northern part of Iraq has struggled in recent years to reestablish its cultural and political identity after decades of oppression under the regime of deposed Iraqi President Saddam Hussein. In December, RFE/RL correspondent Charles Recknagel traveled to this area and filed several reports: