Authorities responded to a fatal crash and tanker truck fire on Interstate 15 near Basin on Tuesday evening.
The crash occurred around 4:30 p.m. about 40 miles south of Helena in Jefferson County, according to a Montana Highway Patrol incident report.
As of 10:30 p.m., the Montana Department of Transportation was advising southbound drivers to expect delays due to reduced speeds and single-lane traffic. Traffic was flowing in the northbound lanes at that time.
Additional information was not immediately available.