Two men who died in a helicopter crash in the Western Australian wheatbelt had been participating in a club event in a private aircraft.
The two-seat Robinson R22 helicopter went down near the Cowcowing Lakes at Booralaming on Sunday, killing the men aged in their 50s and 70s.
It had left Koorda earlier in the day along with 10 planes taking part in a club event.
When the two men failed to arrive at Jandakot Airport, police were alerted about 3.45pm by the Australian Maritime Safety Authority's joint rescue coordination centre.
A search jet then found the wreck.
Police went to the scene and confirmed there were no survivors. A report will be prepared for the coroner.
Royal Aero Club chief executive Alan Wilson confirmed the men had been taking part in the club's Koorda Fly-In event.
"It is with great sadness that we can confirm that the two fatalities in the helicopter crash in the vicinity of Cowcowing Lakes yesterday were club members participating in their private aircraft," he said in a statement on Monday.
"On behalf of the Royal Aero Club of Western Australia, we extend our deepest sympathies and condolences to the families, friends and club members involved."
The Australian Transport Safety Bureau was sending investigators to the scene on Monday.
"Over coming days ATSB investigators will survey and map the accident site and collect any relevant components for further examination and analysis at the ATSB's technical facilities in Canberra," Chief Commissioner Angus Mitchell said in a statement.
"They will also obtain and review any recorded data, weather information, witness reports, and aircraft operator procedures and maintenance records."
WA Police Acting Inspector Kareene Santoro said the conditions were challenging at the crash scene.
"The only way in is via foot. It's more of a salt lake so the ground isn't hard and it's quite mushy and muddy," she told reporters.
Anyone who may have seen or heard the aircraft in any phase of its flight, or who may have footage of any kind is asked to contact witness@atsb.gov.au.
A preliminary report is expected in six to eight weeks.
