A prominent Sunni tribal leader and his son and seven bodyguards have been killed in the Iraqi capital in an attack that has raised fresh questions about the role of militias.<br /> <br />Officials said on Saturday that Sheikh Qassem Sweidan al-Janabi was killed in Sadr City, a Shia district in east Baghdad, after his convoy was ambushed by gunmen.<br /> <br />Janabi, a moderate Sunni, was found shot in the head with his hands tied behind his back. His son was killed by a bullet to the chest while most of his seven bodyguards were shot in the head.<br /> <br />Al Jazeera's Imran Khan reports from Baghdad.
