Just before 1:30 a.m. on Sunday, firefighters responded to a house on Fox Hill Road.
Dennis Leger, aide to Fire Commissioner Joseph Conant, told CBS 3 that a fire started in the rear of the home and spread into the living room area.
Leger estimated the damage at $70,000.
Investigators are classifying the blaze as accidental.
The Red Cross is assisting the mother and two children that lived in the house.
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