An auto safety group says hundreds of deaths may have been caused by faulty air bags in some of the same GM cars now subject to a recall for an ignition switch defect. ABC News reports when airbags failed to deploy in Chevy Colbats and Saturn Ions, Clarence Ditlow at the Center for Auto Safety says 303 people died, "not all of those are the ignition switch defect but the government should have investigated each and every one of them to find out why air bags were not going off." Federal safety regulators said they lacked evidence to warrant an investigation. An ignition switch defect that could cut power to air bags led GM to recall 1.6 million cars. GM said it knows of a dozen deaths and called the new report "pure speculation."