Iraqi police say at least four people have been killed in a car bomb blast outside a popular restaurant in western Baghdad.
Police say at least 13 other people, including police, were hurt when the car blew up Thursday in the predominantly Shi'ite neighborhood of Shula.
The U.S. military says the Shula blast killed one person and wounded 23 others, including police.
Authorities have not said who may have planted the bomb outside the restaurant frequented by police and construction workers.
In another attack, the U.S. military says an American soldier was killed due to "indirect fire" near the northern Iraqi city of Mosul. The military uses the term "indirect fire" to refer to rocket or mortar fire.
Separate military statements say Iraqi security forces arrested 11 suspected terrorists in operations in central, northern and western Iraq in recent days. The military says one person arrested was a major general in Saddam Hussein's regime who allegedly finances anti-coalition forces with possible ties to terrorist and criminal groups.
Also Thursday, Iraqi officials say attackers blew up an oil pipeline in the northern city of Kirkuk. Authorities are working to fix the damage.
Some information for this report was provided by AFP, AP and Reuters.