"I started to put my head out of the tent and I thought I'd been shot but what I realised was I'd actually been clubbed with a rifle barrel so was just bleeding immediately. I was just confused.''
He held his head in his hands as shouting continued around him.
"When I looked to my left I could see one of the guys just attacking porters with a bush knife. There was one guy with a rifle, one guy with a pipe gun and the bush knife.
"There was one person that appeared to be controlling it but they would just go back up to where the porters were and attack again and again.''
PNG Trekking Adventures boss Mark Hitchcock, whose company organised the trek, yesterday said the group had been on the first day of a six-day trek on on the Black Cat Track.
They had established a camp for the night at the village when they were attacked.
"They were held up and all their possessions were stolen.''
Mr Hitchcock said the incident was isolated, and local people were "deeply shocked'' by what had happened.
Papua New Guinea's Prime Minister Peter O'Neill has invoked the nation's death penalty in response to a brutal attack on an international group of trekkers.
The 61km Black Cat track, which runs from the Wau area to Salamaua in northern PNG, takes several days and is dotted with wartime wrecks
It is recommended only for very fit and experienced trekkers.