The state police fire marshal’s office continues to investigate the cause of a house fire that killed a couple late Monday in Raccoon Township. Officials say 69-year-old Gary Hanson and 62-year-old Mary Gonzales Hill were killed in the blaze in the 1500 block of Route 18 in Raccoon. The county coroner says the victims were identified by their dental records. Autopsies have been completed, but officials have declined to release more information pending further investigation. The house was badly damaged by the blaze. The victims were engaged to be married.