A fire that destroyed an unoccupied hunting camp on the Belfast Road in Knox Friday night was no accident, according to an investigator with the state Fire Marshal’s Office.

Monday afternoon, Sgt. Ken Grimes said that determination was made following preliminary inspections at the site of the fire at 1007 Belfast Road.

“It’s being classified as intentionally set,” said Grimes.

Grimes said the fire originated on the outside corner of an attached barn on the property, which he said is under the ownership of Merl Stetson of Berkley, Mass.

Fire Knox Fire Chief Matt Shaw said a passerby reported the fire at between 8 and 8:30 p.m. Friday night, and that the caller reported seeing “a campfire sized fire at the rear of the house.”

“By the time I arrived, and I was the second person on the scene, it was totally involved in the barn-garage part of the house,” said Shaw.

As fire departments from neighboring towns came to assist at the scene, Shaw said the strong winds that swept through the Midcoast Friday evening created additional challenges for firefighters.

The wind gusts carried some of the embers from the structure fire across the road, which Shaw said prompted the need for local forestry units. None of the embers took off enough to cause a full-blown forest fire.

“There were some hot spots in the woods,” said Shaw.

The structure itself was completely destroyed as a result of the blaze.

Shaw said because the camp was unoccupied and the initial fire report indicated the existence of a small campfire at the rear of the building, investigators with the Fire Marshal’s deemed the fire suspicious.

Investigators were at the scene Friday night at about 10 p.m. to begin an initial probe into the potential cause, Shaw said, and an investigation team returned to the site of the fire Saturday.

No firefighters were injured, Shaw said, although Brooks Ambulance attendants stood by at the scene to provide assistance if needed.

Grimes said the investigation is ongoing.