Firemen responded to Manor Care South at 101 Leader Drive when a light haze began to fill one of the hallways in the Loyalsock Township nursing home about 9:20 Friday night. While the problem has been isolated, fire investigators still were trying to determine what caused the haze. Several patients were safely moved from the affected area to safety zones in the one-story structure. Investigators believed the problem could be related to the facility’s heating-air conditioning system