At least 50 people were killed and 180 wounded in a wave of blasts across Baghdad on Tuesday, police said.
There were 14 explosions. Ten were car bombs, three were roadside bombs, and another was what's called a sticky bomb: a device that's placed on an object, many times a vehicle.
Explosions struck the Shiite neighborhoods of Kadhimiya in the northwest; Amil, Bayaa and Shulaa in the southwest; Ur and Zuhour in the northeast; Sadr City, Kamaliya and Amin in the east; and Abu Dhsir in the southern part of the city.
Other blasts struck mixed Sunni-Shiite neighborhoods, including Waziriya, Yarmouk, Jihad and Eghraiat.
A U.S. military spokesman, Lt. Col. Eric Bloom, said no U.S. advisory units have been requested to the scenes of the attacks.
He said there has been no aerial support but notes that the U.S. military always has "eyes in the skies" that feed imagery into the United States and into the Iraqi operational center.
He said the strikes are typical of al Qaeda in Iraq attacks.
During the height of the Iraq war, Baghdad was beset with daily sectarian violence in Sunni and Shiite neighborhoods.
The incidents come two days after a hostage standoff at a Catholic church in Baghdad left 58 people dead.
Seventy-five others were wounded in the attack by gunmen Sunday, officials said, adding that most of the casualties were women and children.
That hours-long standoff ended Sunday after Iraqi security forces stormed the Sayidat al-Nejat church.