Iraqi officials say a wave of car bombings, mainly in Shi'ite areas of Baghdad, has killed 12 people.
Police officials say a car bomb in the neighbourhood of Sadr city killed four people and wounded six.
Another car bomb elsewhere in Sadr city went off near a cluster of homes, killing two people and wounding.
A short while later, a car bomb exploded in a commercial street in Baghdad's eastern district of Jamila, killing three people and wounding 10.
Police say a fourth car bomb went off near a traffic police office in eastern Baghdad, killing three people, including a traffic policeman.
Seven people were wounded in that attack.
Medical officials confirmed casualty figures.
All officials spoke on condition of anonymity because they are not authorised to talk to media.
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