Insurgents used bomb attacks and a drive-by shooting to kill at least 12 Iraqis and wound 29 on Sunday, including a police officer and his four children who died when an explosion set fire to their vehicle in northern Iraq, officials said. Also Sunday, the U.S. military confirmed that an angry mob of insurgents had attacked a convoy of American contractors last month when they got lost in a Sunni Arab town north of Baghdad, killing four and wounding two. The attack occurred on Sept. 20 when the convoy, which included U.S. military guards riding in Humvees, made a wrong turn into the town of Duluiyah and insurgents opened fire with rifles and rocket-propelled grenades, Maj. Richard Goldenberg, a spokesman for Task Force Liberty in north-central Iraq, told The Associated Press.