Four victims killed in a plane crash Dec. 29 have been identified, but the cause of the crash has not been confirmed.

Jon R. Bernhoft, 63, of Sequim was identified as the pilot of a single-engine Cessna that crashed in the woods near the Dabob Bay area, along Hood Canal in Jefferson County.

Passengers were his fiancée Carla Parke, 61, and her 9-year-old grandson and her 5-year-old granddaughter, both of Bellingham, according to Jefferson County Coroner Michael Haas.

The plane departed Seattle’s Boeing Field just after 6 p.m. on Thursday, Dec. 29, bound for Port Angeles, according to the Washington State Department of Transportation (WSDOT). Air traffic control lost contact with the plane at 6:44 p.m. in the general area of Dabob Bay. Emergency locator signals were used to define the search area.

Using radar forensics data and the plane’s emergency locator transmitter, search crews were able to find the aircraft in a heavily wooded ravine Friday morning, Dec. 30, according to a press release from WSDOT.

The airplane’s four occupants were found in the wreckage, deceased, according to WSDOT.

The Federal Aviation Administration and National Transportation Safety Board (NTSB) investigators were slated to examine the aircraft Dec. 31. NTSB is heading up the investigation with respect to the cause of the crash, according to Haas, who also reported that autopsies were set for Jan. 3 in Kitsap County.

Emergency response personnel involved include Jefferson County Search and Rescue, Jefferson County Sheriff’s Office, WSDOT, Civil Air Patrol, U.S. Navy, the state Emergency Management Division, Quilcene Fire Rescue and Port Ludlow Fire & Rescue.