Iraqi National Guard troops have raided a Sunni mosque in Baghdad.
Reports say about 200 national guardsmen stormed the al-Hanifa mosque Friday, following weekly prayers, throwing stun grenades and firing shots in the air. Casualties were reported during the fighting inside the mosque.
The purpose of the raid was not immediately clear, but worshippers say the Iraqi troops arrested the mosque's imam.
Meanwhile, the top commander of U.S. Marines in Iraq says U.S. and Iraqi troops have "broken the back" of the insurgency there by taking control of Fallujah.
Lieutenant General John Sattler said the 11-day operation has pushed the insurgents out of their safe haven and into less familiar areas. But he said Fallujah is not quite secure yet.