(KMOV) -- Firefighters are investigating a fire at Top Gun Shooting Range at 4075 West Outer Road, along I-55, just south of Arnold.
It started around 7:30 p.m. on Thursday in a back room.
Firefighters say hot spots in the roof are a main concern. The fire did not spread to the stockpiles of ammunition, which could have made this an even larger disaster.
A manager of the shooting range believes the fire was caused by something electrical.
Authorities say everyone was evacuated and that there are no injuries.