BATH — A 13-year-old Maine boy has been charged with arson, accusing him of starting a fire that gutted the back of a Bath home.

Maine State Fire Marshal’s investigators say the boy started the fire on Thursday night.

Sgt. Joel Davis of the Maine State Fire Marshal’s Office told the Bangor Daily News that he thinks the teen acted alone. He would not comment on the motive for the alleged crime.

The fire destroyed the rear of the building, which is owned by a woman who lives there with her 16-year-old son.