Authorities say a helicopter crash near Thompson Falls has left one person dead. Sanders County Sheriff Tom Rummel said the helicopter went down Saturday afternoon in the Prospect Creek drainage outside of Thompson Falls. Fire officials say that there was one fatality, and two other people were transported to a hospital.The accident took place about 10 miles up Prospect Creek Road, responders had to cut through brush to get to the site. Sanders County Search and Rescue, Forest Service and fire personnel all responded to the scene. The cause of the crash hasn't been determined.