A police officer says the two men who were killed, the head of a local council and a council member, were traveling in the same car in the town of Tuz Khormato when the bomb exploded Tuesday morning. A third official, a mayor, was wounded.
A medical official confirmed the casualty figures. Both officials spoke on condition of anonymity as they were not authorized to release information.
Tuz Khormato is located about 210 kilometers (130 miles) north Baghdad.
Insurgents are still able to hunt down local officials and launch lethal attacks nationwide despite the large decrease in violence in recent years.
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