Iraqi troops have clashed with insurgents for a second straight day in a mainly Sunni Arab district of Baghdad.
The U.S. military says the fierce fighting started Monday when about 50 gunmen fired on Iraqi forces, sparking a battle that involved U.S. troops. U.S. officials say at least five insurgents were killed and another seven captured.
The total number of casualties from the fighting in the Adhamiya district is unclear.
Elsewhere Tuesday in the capital, an insurgent bomb attack killed at least four Iraqis. Officials say the bomb was aimed at nearby police officers.
West of Baghdad, heavy fighting erupted Monday between U.S. forces and insurgents hiding in a mosque in Ramadi. No details on casualties are available.
Iraqi leaders remain deadlocked on forming a new government as fighting raged on across the country. Parliament was due to open Monday, but that session was put off as Shi'ites, Sunni Arabs and Kurds tried to agree on who will serve as prime minister.