Officials suspect an arsonist caught a Lake City roofing material company on fire Saturday afternoon.
Propane tanks caused explosions inside a Dixie Roofing Company storage building on Industrial Park Drive, which also destroyed a pick-up truck in the facility.
Crews transported a firefighter, who was injured while fighting the blaze, to the hospital.
At one point, firefighters said the blaze sent flames nearly 50 feet up in the air.
Authorities continue to investigate what spark the blaze and suspect that the fire completely damaged the building.