A small fire in a third floor air system at General Mills' Covington plant was contained with minimal damage, according to Covington Fire Marshall Deputy Chief Tony Smith.

The plant has an air system - separate from it's air conditioning and ventilation system -that collects grain dust from General Mills' food processing and moves it through a series of metal lines to a hopper. Smith said officials believe a buildup of grain dust got overheated and smoldered - officials never saw any actual fire.

Firefighters disassembled the line and flooded it with water to remove any hot embers, Smith said. He said General Mills would likely have to replace the motor of the air moving system, but said there was not any major damage.