WALDOBORO, Maine — A small sawmill was destroyed by fire early Sunday morning.

The fire was reported shortly after 1:30 a.m. at 2041 Old Augusta Road, according to Waldoboro Assistant Fire Chief William Maxwell.

When crews arrived, the building was engulfed in flames and was collapsing.

He said a camper trailer was located on the lot next to the building and the first firefighter arriving at the scene had to wake the residents to alert them to the fire.

The department sent three trucks and 14 men to the scene. The Warren Fire Department also sent firefighters to the scene and manned the Waldoboro Fire Station until Waldoboro crews returned shortly before 6 a.m.

The cause of the fire was not immediately known, Maxwell said. The state fire marshal was called to investigate.

The property is owned by Conrad Miller Testamentary Trust, according to assessment records by the town.

Maine Public Safety spokesman Stephen McCausland said Monday morning two investigators from the fire marshal’s office have been assigned to the case.