The California Highway Patrol is investigating a fatal traffic accident that occurred Saturday afternoon.

The accident was reported at about 1:45 p.m. when motorists saw a car run off eastbound Intestate 8 on Mt. Springs grade near the county line. Reports indicated the car rolled over and then plunged down a cliff coming to rest about 200 feet off the roadway. One person was ejected from the car and the car caught on fire. One person was declared dead at the scene. The Imperial County Coroner’s Office and the California Highway Patrol are investigating.