THE CAUSE OF A WEEKEND HOUSE FIRE IN KINGSPORT IS UNDER INVESTIGATION. AUTHORITIES WERE CALLED OUT TO A HOME ON FOREST DALE DRIVE IN THE RIDGEFIELDS COMMUNITY SATURDAY EVENING. DEPUTY CHIEF RON NUNLEY SAID BY THE TIME FIREFIGHTERS ARRIVED ON SCENE, THERE WAS HEAVY SMOKE AND THE HOUSE WAS FULLY ENGULFED. THE HOME BELONGED TO A LONGTIME KINGSPORT POLICE OFFICER. NUNLEY SAID THERE IS NOTHING AT THIS TIME TO INDICATE THE BLAZE WAS SUSPICIOUS. THE CAUSE OF THE FIRE IS UNDER INVESTIGATION.