Investigators said Friday static electricity was to blame for a Thursday warehouse fire.
Investigators said that a spark from static electricity likely occurred when workers were transferring fuel.
More than 85 firefighters worked to contain the flames at the R.D Holder Oil Co., located at 2319 Folk Ream Rd., 10TV News reported.
One firefighter suffered a minor leg injury during the fire. All employees escaped the building without injury.
Investigators from the State Fire Marshal's Office were expected to return to the scene of the fire on Friday to complete the investigation.
According to the company's Web site, R.D. Holder Co. supplies fuel, oil lubricants and products to Ohio and northern Kentucky customers.
It supplies diesel fuel, heating oil, gasoline, Dragon racing fuel and bio-diesel fuels. They also supply automotive and heavy-duty lubricants.
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