The umbrella group includes a number of Sunni extremist organizations and has ties to al Qaeda in Iraq . A car bomb exploded in the Shiite city of Kut . Police officials say attackers in Baghdad left behind a black flag . The flag represents the Islamic State of Iraq , which has ties to al Qaeda .
A car bomb exploded in the Shiite city of Kut . Police officials say attackers in Baghdad left behind a black flag . The flag represents the Islamic State of Iraq , which has ties to al Qaeda .