Iraqi police say a series of rush-hour bombings across Baghdad hit commuters on their way to work, killing four and injuring at least 16.
Sunday's deadliest strike came when a roadside bomb exploded at 7:15 a.m. local time next to a minibus heading from the Shiite neighborhood of Sadr City into downtown.
Police said three people were killed, including a police officer, and nine were wounded. A hospital worker confirmed the casualties.
Earlier, three bombs planted a few meters away from each other in a downtown business district blew up simultaneously. Police and hospital officials said a bystander was killed and seven injured. All officials spoke on condition of anonymity because they were not authorized to talk to the media.