Iraqi authorities say insurgents have stormed a police station south of Baghdad, killing a police commander and three officers.
Officials say the gunmen armed with rocket-propelled grenades and automatic rifles carried out the pre-dawn Wednesday raid in the town of Madain, about 20 kilometers south of the capital.
Police say they detained about 50 suspects, including a Syrian national, after the assault.
Tuesday, some 100 insurgents stormed the police headquarters in the town of Muqdadiyah, north of Baghdad, killing at least 17 policemen and freeing more than 30 prisoners.
Separately, the U.S. military says Iraqi and multinational troops killed one insurgent, detained 11 suspects and confiscated a weapons cache near the town of Latfiyah Wednesday.
A U.S. military court has convicted Sergeant Michael Smith of abusing prisoners at Baghdad's Abu Ghraib prison by using dogs to intimidate them.
Nine other U.S. soldiers have been convicted of abusing Iraqi detainees at Abu Ghraib. The longest sentence so far has been 10 years in prison.Some information for this report was provided by AP and Reuters.