Update 5:45 p.m.
The fire at the Billings landfill has been put out. Firefighters are still on the scene mopping up and investigating the cause.
Update 4:25 p.m.
The main gate to the landfill is closed.
Billings police, Billings firefighters and the AMR ambulance are all responding.
Firefighters are using a Bobcat to push material out of the building, and they are not attacking the fire from the roof or cutting a hole from up top to douse any flames.
A building at the Billings landfill started on fire Wednesday afternoon.
A Q2 photographer is headed to the scene.
This is a developing story. Check back for details.