The four injured porters were reportedly taken to Lae International Hospital amid concerns over inadequate medical infrastructure, equipment, staffing and care at Angau hospital.

It follows the death of Lionel Agilio, one of the seven porters injured in the Black Cat Track attack on a tourist group hiking the arduous trail.

Agilio is reported to have died as a result of infection and heart failure in the sub-standard facility.

The Australian reported that Lae International Hospital chairman Malcolm Lewis visited Angau Public Hospital on Sunday, and saw one of the men lying in blood-soaked bandages on a blood-soaked bed.

"Another, who'd just had an operation, was lying on an inch-thick mattress on the floor in pain," Lewis told the newspaper.

"Most had infections, but none had penicillin drips. They were just copping it. It was terrible."

Lewis told the newspaper that food and water for the injured porters had not been provided by Angau, but was brought into the hospital by staff from the Newcrest-run Morobe Mining venture.

When the porters were taken to Angau last week, just one doctor and a nurse were working, Lewis said.

Power outages allegedly caused operations to be postponed. And the Angau blood bank was closed all day because it was a long weekend, followed by Independence Day on Monday.

"We know what happens in Angau," Lewis said. "People die."

Armed men attacked the trekking group's campsite on the remote Black Cat Track last Tuesday, killing two other Papua New Guinean guides and badly injuring four others, while four Australian trekkers were also injured.