FLORENCE, Wis. — Authorities in northern Wisconsin say the woman killed in an all-terrain vehicle crash was a student at North Dakota State University.

The Florence County Sheriff’s Office says 21-year-old Ellie Helm died after crashing the ATV into a tree Friday night. Passenger Justin Krause was injured.

Officials say speed, inexperience in operating an ATV and alcohol were all contributing factors in the crash. The university says Helm was a sophomore majoring in psychology. She was a member of the Kappa Delta sorority and was a Bison cheerleader.

Both Helm and Krause are from Fish Creek.