Six car bombs explode in Baghdad , Iraq 's Interior Ministry says . A third a few hours earlier injured at least five civilians in a predominantly Shiite area of southwestern Baghdad , according to the ministry . Separate roadside bombing south of Baghdad kills five civilians , official says . U.S. , Iraqi forces ambushed in northern Baghdad ; four attackers killed , U.S. military says .
Six car bombs explode in Baghdad , Iraq 's Interior Ministry says . Separate roadside bombing south of Baghdad kills five civilians , official says . U.S. , Iraqi forces ambushed in northern Baghdad ; four attackers killed , U.S. military says .