(UPDATE, 4 p.m.) The roads around Calumet Refinery in Great Falls are now open and Great Falls police have cleared the scene. The cause of the incident is under investigation.
(1:55 p.m.) Emergency crews are responding to a reported explosion and possible fire at the Calumet Refinery along Smelter Avenue in Great Falls.
North Middle School and Sacajawea Elementary Schools have a shelter in place as does the City of Great Falls Animal Shelter.
Anyone who is in the area around the refinery is asked to shelter in your home or business with windows and doors closed.
Traffic is shut down in the area around the refinery including along the 9th Street, the Old Havre Highway, and Smelter Avenue.
The establishments around the refinery have been evacuated such as the Montana Club and the Mountain View Co-Ops.
Drivers are asked to avoid the area. Delays are expected.
Responding crews including Great Falls Fire Rescue and the Great Falls Police Department.
We have a reporter on scene and will update you when we get more information.