The killing happened along the Mendi highway.
Undialu said he had anticipated such an attack, which was why he came out in the media to warn the public not to interfere with issues affecting the people of Hela.
Governor Undialu said killing, robbery and rape is common along the Nipa-Mendi section of the Highlands Highway and leaders of the province need to come out and address this.
He said the name of the entire Southern Highlands and Hela province continues to be tarnished, thanks to a handful of troublemakers.
