Police officials said the deadliest attack took place when two car bombs went off almost simultaneously in separate commercial streets in the Shiite neighborhood of Shula in northern Baghdad, killing nine people and wounding 19 others.
A car bomb blast near a small restaurant in a Shiite neighborhood in eastern Baghdad killed four people and wounded 13 others, said police.
Earlier, a car bomb exploded near the al-Farasha pastry shop in the Shiite southeastern New Baghdad district, killing five people and wounding 13 others, including women and children.
No one immediately claimed responsibility for today's attacks. But coordinated bombings against Shiites and the security forces are frequently the work of al-Qaida's affiliate in Iraq, which has been emboldened by the successes of its fellow militants in the civil war next door in Syria and by widespread Sunni anger at the Shiite-led government.
Medics in a nearby hospital confirmed the casualties. All officials spoke on condition of anonymity because they were not authorized to brief journalists.