A 26-year-old woman from Pennsylvania drowned after falling into the water above St. Mary’s Falls in Glacier National Park, Montana.

Witnesses reported that she was swept over the falls and trapped underwater for several minutes. Bystanders managed to pull her out and performed CPR until emergency responders arrived.

Despite efforts from park rangers, an ambulance crew, and a rescue helicopter, she was pronounced dead around 7:20 PM.

The incident is under investigation, and a state medical examiner will conduct an autopsy, The Guardian has reported.

The National Park Service is notifying her family and has not released her name. Officials extended their condolences and requested privacy for her family.

This incident is part of a series of recent hiking accidents across the US.

Written by B.C. Begley