A 32-year-old Perth trekker has died from a suspected heart attack, soon after setting out on the gruelling Kokoda Track in Papua New Guinea.
The Kokoda Spirit trekking company says Shane Green died last Sunday, during the steep ascent to the Deniki campsite, several hours south from Kokoda.
It says the young man just keeled over, and trekking masters tried CPR and mouth-to-mouth resuscitation.
The company says every walker has to have a doctor's certificate that proves they're fit to walk.
Some of Mr Green's family are now in Port Moresby and his wife in Perth has been informed.
This year around five thousand Australians are expected to take on the challenge of the historic 96 kilometre track, where Australian troops resisted invading Japanese forces during World War Two.