Baghdad: Iraqi national guardsmen were killed and civilians wounded by a car bomb blast in southern Baghdad. A US military official says later a man carrying a case blew himself up, killing "a couple of people".

Mosul: Multiple car bombings on police buildings rock the city killing at least 62 and wounding more than 200. Apart from the Iraqi casualties, the US military says an American soldier was killed and three wounded in the blasts. It said a security guard was also killed.

Baquba: Scores of black-clad gunmen, some claiming loyalty to Jordanian fighter Abu Musab al-Zarqawi, attack a police station and other government buildings in Baquba, 60 km northwest of Baghdad, in a dawn assault.

The US military says between 20 and 30 insurgents are killed.

The US Army says two soldiers were killed and seven wounded in an ambush that involved roadside bombs as well as small-arms and rocket-propelled grenade fire.

Ramadi: Insurgents fired mortars at two police stations and the house of a security official in Ramadi, 110 km west of Baghdad. They also clash with US troops. The US military says eight people are killed.

Falluja: Fierce clashes rage for two hours in Falluja where US marines call in air strikes by planes and helicopters in the rebellious town west of Baghdad.

A US Cobra helicopter is shot down during the Falluja fighting but the crew walks away unhurt, marines say.