COMBINED LOCKS, Wisconsin (From news reports) -- Crews put out a fire at a Combined Locks paper mill early Saturday morning.

Just before 2:30 a.m., firefighters from multiple agencies responded to McKinley Paper at 540 Prospect Street in Combined Locks for a report of a structure fire.

Initial dispatch information indicated that the fire was located in the back side of the mill and involved a pulp conveyor system. Mill Emergency Response Team Firefighters were also deployed for initial containment.

On arrival, fire officers confirmed that the Mill ERT had knocked the fire down.

An officer from Fox Valley Metro Police Department was utilizing a drone and had seen what appeared to be smoke and flames coming from the roof of the mill.

While crews were inside the mill checking for fire extension, another crew made their way to the roof via ground ladders.

After checking with Thermal Imaging Cameras, it was verified that there was no extension to the roof.

Fire Department personnel from Combined Locks and Buchanan assisted with smoke ejection using fans.

There were several hot spots remaining where the original fire was, and fire crews focused on cooling those and flushing any remaining embers and areas that were still containing heat.

After those tasks were completed, the mill area was turned back over to mill supervisors who were working on identifying the cause of the fire.

Quick work knocking down the initial fire by the mill's ERT prevented the fire from spreading and kept the situation under control.