EAST PEORIA, Ill. -- A small fire broke out on Caterpillar's East Peoria campus early Thursday morning.
Just before 11:00 a.m., firefighters were called to CC3, a building was once used as a power plant where coal was burned to heat up boilers.
East Peoria Police Chief William Darin said that residual coal dust in the plant's exhaust ducts was what caught on fire.
Firefighters had to use saws to cut open the stainless steel ducts in order to get access to the fire burning inside.
The building was empty and in the process of being torn down at the time of the fire.
Fire crews are not sure what caused the coal dust to catch on fire since demolition was occurring in another part of the building.
Four fire departments and Caterpillar's own fire crew attended the fire.
No one was injured and production was not affected.