The US military says a roadside bomb killed three American soldiers on Saturday in central Baghdad. No further details were immediately available.
In separate violence, a suicide car bomber attacked a checkpoint near the western Iraqi city of Ramadi, killing at least one policeman and 11 civilians.
Also, police in Iraq say gunmen shot and killed six men from the same Sunni family in a raid on a home south of the Iraqi capital. Authorities say the family had received death threats from Sunni insurgents for taking part in a reconciliation meeting with Shi'ites last month.
Meanwhile, the US military said coalition forces today detained nine suspected terrorists in a raid targeting al-Qaida in Iraq just north of Baghdad near Taji.
American officials say coalition airstrikes Friday near the same area targeted an al-Qaida in Iraq network responsible for threats against coalition aircraft. Insurgents have shot down eight coalition helicopters since January 20th.
In another development, Iraqi officials say an adviser to the Iraqi defense department Lieutenant General Thamir Sultan has been kidnapped in Baghdad.