A teenager has been killed in a single vehicle collision at Mannering Park on the Central Coast.
About 5.35am the 17-year-old female was driving on Rutleys Road when the vehicle left the roadway and hit a tree.
An off-duty police officer located the wreckage and found the driver deceased in the vehicle.
An investigation is underway into the circumstances surrounding the collision and the vehicle will be mechanically examined.
A report will be prepared for the Coroner.