Insurgents slit the throats of three tribal policemen in an attack on a checkpoint in the multi-ethnic city of Kirkuk, police sources said Tuesday.
Iraqi tribal police, also known as "Awakening Councils," are US- baked Sunni units formed to fight al-Qaeda militants in Iraq, reported dpa.
Tribal leaders who were tired of al-Qaeda's indiscriminate killings and austere version of Islam collaborated with the US military to fight the terrorist organization.
Insurgents slit the throats of three Awakening Council members while they were asleep, General Sarhad Qader told Voices of Iraq (VOI) news agency.
The attack targeted an Awakening Council checkpoint near the village of Hindiya to the west of Kirkuk.
Kirkuk is located some 250 kilometers north-east the Iraqi capital Baghdad.