The weather and a heating system have been ruled out as sources of ignition, Ritton said.
Investigators are checking with New York State Electric and Gas Corp. to confirm whether there was electrical service to the building, Ritton said. Other possible ignition sources are being considered, such as a dropped cigarette, he said, and accelerants.
Otsego County received three or four 911 calls reporting the fire, Ritton said, and officials are reaching out to those callers.
The fire could be seen from Interstate 88, Ritton said. A crew on a Canadian Pacific train passing through Otego did call 911 to report the blaze, he said, and officials are trying to contact the crew, which has traveled out of the area.
The building that burned was across the tracks from three storage buildings along Railroad Avenue, Ritton said, and the tracks were closed during part of the firefighters’ response.