Local and state fire marshals are working to determine what caused a house in Colchester to catch on fire and become uninhabitable on Saturday morning. Firefighters said they responded to a home on Deer Run Drive shortly before 5 a.m. after getting a report of a structure fire. When crews arrived, the house was fully involved. Fire officials said it is considered a total loss and is uninhabitable. The family who lives in the home were away at the time of the fire, but their pets were inside, according to fire officials. It's unclear if the pets were able to be saved.