A car bomb killed eight U.S. Marines outside Fallujah on Saturday, the deadliest attack against the U.S. military in nearly six months. Marines pounded guerrilla positions on the outskirts of Fallujah, where American forces are gearing up for a major assault on the insurgent stronghold. The Marines later reported a ninth combat death Saturday but did not say whether it was in the car bombing or another action. Efforts to contact the Marines for clarification were unsuccessful. In Baghdad, another car bomb exploded outside an Arabic television network's offices, killing seven people and injuring 19 in the biggest attack against a news organization since the occupation began last year. The U.S. military said nine Marines were also wounded in the fighting in Anbar province west of the capital which includes the insurgent stronghold of Fallujah.