Most of the blasts came from explosives-rigged parked cars and one by a bomb that ripped through an outdoor market, police said.
In Baghdad, a car bomb targeting shoppers in the southwestern Amil neighborhood killed seven people and wounded 17, police said. A bomb at a cafe in Baghdad's Sadr City neighbourhood killed four people and wounded 15, authorities said. Another bomb in a commercial street in central Baghdad killed three people and wounded 13, police said, while an explosion near the Green Zone killed three people and wounded eight.
A police officer said an explosion killed four people and wounded 10 in the nearby town of Iskandariyah, about 50 kilometers south of the capital.
In Mishada, about 30 kilometers north of Baghdad, a car bomb killed five civilians and wounded 14, another police officer said. A bomb in Baghdad's southeastern suburb of Jisr Diyala killed two civilians and wounded seven, police said.
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Three medical officials confirmed the casualty figures. All officials spoke on condition of anonymity as they were not authorized to release the information.
No one immediately claimed responsibility for the attacks, but they bore the hallmarks of al-Qaida and other Sunni insurgents, who frequently use car bombs and suicide attacks to target public areas and government buildings in their bid to undermine confidence in the government.