Australian trekkers attacked by bandits in remote, mountainous northern Papua New Guinea suffered knife wounds and had to walk for hours to reach help.
Daniel King, husband of trek leader Christie King, told AAP the group of eight Australians, one New Zealander and a group of 15 local porters were attacked by bandits at about 3.30pm on Tuesday.
Two PNG porters were killed.
They were attacked while walking on the Black Cat track between Wau and Salamaua in Morobe province in northern PNG.
“Everything's ok, in terms of the group,” Mr King said.
“A few of them have cuts and bruises and stitches. We have a plan now to get them out this afternoon.”
“They were about six hours out. They were at their first camp when the incident happened, and they had to walk with injuries.”
Two helicopters are being sent to rescue the injured porters.
The Australians and one New Zealander trekked four hours to Wau villages to get help, after 10 of their porters were left injured.
"They all have knife wounds," said Morobe Mining Joint Venture (MMJV) spokesman Stanley Komunt, referring to the porters.
He said PNG police and MMJV choppers have already rescued five of the injured porters.
"It's five minutes away by chopper, three hour walk to the nearest village. Four hours to Wau," Mr Komunt said.
The group of eight Australians and one New Zealander were given medical attention in Wau, where they spent the night.
"They were extracted by villagers," Mr Komunt said. "They're expected back in Port Moresby this afternoon."
After the attack the Australians and the New Zealander decided to leave the porters and seek help, heading in the same direction as their fleeing attackers.
A department of foreign affairs (DFAT) spokeswoman said none of the tourists' injuries were life threatening.
“The attack resulted in the deaths of two PNG nationals who were porters for the group,” she said in a statement.
“Our sympathies are with the family and friends of those who were killed.”
The DFAT spokeswoman said the group's trekking company, PNG Trekking Adventures arranged medical treatment when they arrived at Wau late on Tuesday.
The Australian High Commission in Port Moresby has provided consular support and will meet with the group when they return to Port Moresby.
The spokeswoman says DFAT advises Australians in PNG to exercise a high degree of caution because of the high level of serious crime.
That advice has now been updated to provide details of the latest incident.
“We recommend that trekkers avoid the Black Cat Track until the local police have investigated this incident,” she said.
DFAT has not changed its travel advice for other PNG treks such as Kokoda.
Mr King says attacks are very rare.
“It hurts the whole trekking industry in the country,” he said.
The Black Cat Track was the scene of bitter fighting between Australian and US troops and Japanese forces in 1943.
It is regarded as one of the most arduous walks in PNG.Earlier this year, then home affairs minister Jason Clare and coalition immigration spokesman Scott Morrison walked the track, accompanied by a pair of wounded soldiers.