Emergency crews are at the scene of a vehicle crash on the west side of Great Falls.
The crash was reported to the Montana Highway Patrol at 7:41 pm on Monday.
It happened along Vaughn Road between Stuckey Road and I-15; authorities are blocking Northwest Bypass at Stuckey Road/Watson Coulee Road.
Great Falls Fire Rescue posted on Facebook that it is a "significant vehicle accident."
At this point, the MHP will only confirm that at least one person has been injured.
A witness told KRTV that a Mercy Flight helicopter was at the scene.
There is no word yet on how many vehicles are involved, nor the cause of the crash.
We will update you if we get more information.
(UPDATE, 9:55 pm) Two vehicles were involved in a head-on collision in the northbound lane. One person was injured; the other driver was conscious and appeared to be OK, according to a Montana Highway Patrol trooper. The southbound lane on the road is still closed until the vehicles are moved out of the way.