Six members of one family were killed when unknown gunmen attacked their house on Friday, dpa reported according to security sources.
The attack took place in Falluja, 60 kilometres west of Baghdad.
Some members of the family worked with the Sahwa militia, the security sources said.
Also known as Sunni Awakening movement, Sahwa is comprised of Sunni fighters who joined Iraqi and US troops to combat al-Qaeda in Iraq. Its members regularly come under attack.
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