Firefighters have extinguished a fire at K&S Fuel Injection in Weston.
The call for the fire came in just before 9 p.m. Monday night.
According to the South Area Fire and Emergency Response District, the fire was out within 20 minutes of them arriving at the scene. There's extensive damage to a corner of the building where construction was being done.
No one was hurt as the building was empty at the time of the fire.
Safer, Riverside, Ringle, Kronenwetter, Mosinee and Wausau fire departments were called to respond, as was the Salvation Army.
An investigation is underway into the cause of the fire.