Kakas said it could be the highest death toll from such violence in the highlands, where there are few roads and most of the inhabitants are subsistence farmers.
Police in the capital of Port Moresby did not immediately respond to the AP’s request for information on the massacre.
Papua New Guinea is a diverse, developing nation of 10 million people with 800 languages in a strategically important part of the South Pacific.
Internal security has become an increasing challenge for its government as China, the United States and Australia seek closer security ties.
Australian Prime Minister Anthony Albanese said his government was ready to assist Papua New Guinea, which is Australia’s nearest neighbour and the largest single recipient of Australian foreign aid.
“That is very disturbing the news that has come out of Papua New Guinea,” Albanese said.
“We remain available to provide whatever support we can, in a practical way, of course, to help our friends in PNG,” Albanese added.
Albanese said Australia was already providing “considerable support” for Papua New Guinea and was helping to train the country’s police officers.
Tribal violence in the Enga region has intensified since elections in 2022 that maintained PNG Prime Minister James Marape’s administration. Elections and accompanying allegations of cheating and process anomalies have always triggered violence throughout the country.
Enga governor Peter Ipatas said there were warnings tribal fighting was about to erupt.
“From a provincial perspective, we knew this fight was going to be on, and we [alerted] the security forces last week to make sure they took appropriate action to ensure this didn’t occur,” Ipatas told ABC.
Ipatas described the violence as a “very, very sad occasion for us in the province, and it’s a bad thing for the country.”
Scores of people have died in tribal fighting in the Enga region in the past year.
Port Moresby’s Post-Courier newspaper has reported high-powered firearms used in the recent fighting made it risky for police to enter the battlefields.
Police said they were assisted by the military in protecting the general public and government property.
Papua New Guinea government lawyer Oliver Nobetau expected more lives would be lost in retaliation for the massacre.
“There’s a big concern that this will continue on. Revenge killings tend to be a normal thing that happens,” said Nobetau, who is on temporary assignment to the Sydney-based international policy think tank Lowy Institute. “Tribal violence is something that happens commonly, but never to this scale,” Nobetau added.
Police had limited resources to deal with such violence on a “massive scale”, Nobetau said.
“Tribal violence is something that is prevalent and the government, with its limited resources, will try to deploy the police wherever they can to try to curb the security issues,” he said.