Investigators say a fire that swept through an abandoned paper mill in the central Maine town of Gardiner was intentionally set. Sgt. Ken Grimes who is with the State Fire Marshal’s office says they do not have any firm suspects, but adds they are following leads. He says it appears the fire was set in two separate parts of the building.Officials say about half of the old Gardiner Paperboard Mill on Water Street was razed by the fire, which was reported at around 3 a.m. Wednesday. Police found a man Wednesday hiding in the woods near the mill. They took him into custody. He has since been released.