The fire department was sent to the scene in the 3600-block of Fourth Avenue at about 4:57 a.m.
Chopper 7HD flew above the scene as several stacks vehicles could be seen in the fire. The Gary Fire Department confirmed the fire is at S&S Sales & Services, a towing service.
No injuries have been reported and homes east of the fire are not impacted. It is not known what caused the fire.