Witnesses and security officials in Baghdad say US forces have staged air raids on a Shi'ite neighbrohood of the city, killing at least five people.
Some reports from Baghdad say the US air strike on the Shi'ite enclave of Shula may have killed as many as nine people.
A US military spokesman said he could not comment on an ongoing operation.
In other news on Monday, Iraqi police found the bodies of 46 people in and around Baghdad. Most of the bodies had been tortured in suspected sectarian attacks.
Also in Baghdad, Iraqi police said a suicide bomber struck a bus in a largely Shi'ite district Shaab, killing at least 11 people.
A bomb blast in the city killed two US soldiers.
Meanwhile, Turkish officials have confirmed that a body found near Baghdad's airport was that of a Turkish contractor Yildirim Tek kidnapped in July.
Amid the violence, the US commander in the Middle East General John Abizaid met with Iraqi Prime Minister Nouri al-Maliki to reaffirm the US commitment to success in Iraq.
The meeting comes after last week's US midterm elections, in which Democrats won control of both houses of Congress. Many Democrats support a phased US withdrawal from Iraq.