MILO, Maine (AP) — The state fire marshal’s office has ruled that an early-morning fire that destroyed a large part of downtown Milo was intentionally set.

Investigators said the fire started at about 3:20 a.m. Sunday under a rear stairway on the outside of a building that housed Hobknobbers Pub. It then spread to the roof of the building before spreading to four other buildings on Main Street, burning at least a third of the Piscataquis County town’s downtown.

The fire marshal’s office said the pub had been broken into prior to the fire. A “person of interest” has been questioned, but no arrests have been made.