Gunmen have shot dead three anti-al-Qa'ida fighters manning a security checkpoint north of Baghdad, Iraqi officials said.
A police officer said the fighters of the Sahwa, or Awakening, movement were attacked early today near the town of Dujail, 50 miles north of Baghdad. Two other Sahwa members were injured.
A health official confirmed the casualty figures.
The Sahwa are Sunni Arabs who joined forces with the US military to fight al-Qaida at the height of Iraq's insurgency. They have been regular targets for Sunni insurgents who see them as traitors.
The shooting came a day after a wave of bombings and other attacks across Iraq killed at least 92 people.