"This is just such a tragedy. It's going to be devastating for the kids because it's such a small school and everybody knows everybody," Allen told the Bangor Daily News.
Officials from the state fire marshal's office, aided by state police detectives, were investigating the fire. The victims' bodies were taken to the state medical examiner's officer in Augusta.
The Johnsons moved into the rented house about six months ago from Bangor, McCausland said. Johnson worked at Hollywood Casino in Bangor, and Christine Johnson is an author who worked out of the house.
Investigators are expected to return to the scene Sunday.