WA Police have confirmed two people have died in a gyrocopter crash just off the shore line of Forrest Beach near Capel.
The accident occurred around 2:20pm today.
Police say a witness saw the plane drop about 200m from the sky and into the water.
Both male occupants did not survive the incident.
The aircraft is still in the water (as of 5:30pm) but will be recovered and sent to Bunbury for forensic officers to look through.
Anyone with information regarding this crash, or who saw the aircraft prior to the crash, is asked to call Crime Stoppers on 1800 333 000 or report the information online at www.crimestopperswa.com.au