Several fire departments were called out Thursday night to battle flames at a vacant warehouse in the Town of Barton, just outside the Village of Waverly line.
The blaze broke out in a building off Broad Street Extension, just to the west of the Midwestern Pet Foods plant.
One firefighter suffered minor injuries fighting the blaze, authorities said. Nobody else was hurt.
The structure sustained heavy damage. Investigators from the Tioga County Office of Emergency Services and New York State Office of Fire Prevention and Control were on the scene Friday morning, along with New York State Police investigators and troopers.