A helicopter crashed in the area of Knik Glacier killing five and leaving one in serious but stable condition, Alaska authorities said. Alaska State Troopers said in a statement Sunday that they received a report of an overdue helicopter and the location of possible crash debris Saturday night.

A rescue team from Alaska Rescue Coordination Center was dispatched to the crash site just after 10 p.m., troopers wrote. The team arrived to find five occupants dead and a sole survivor, who was taken to a hospital. No identities were immediately released, but authorities are notifying next of kin.