The blast occurred about 7 p.m. local time in the predominately Shiite town 37 miles south of Baghdad in Wasit province, CNN reported.
The bombing was the latest in a string of attacks that have killed dozens in Iraq in the past several days, the U.S. news network said.
While violence is down from its peak in 2006-2007, last month up to 325 people died in attacks, CNN noted.
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