Lae Metropolitan Superintendent Anthony Wagambie Jnr said the incident happened in the early hours of Saturday morning at Three-Mile, Lae.
He said the deceased was a young community leader who confronted a drunken man who was causing nuisance and disturbance in the community.
“It is reported that the disorderly person’s relative came into the fight and attacked the young leader with a bush knife, killing him. The rest of the community came in and a fight erupted,” Wagambie Jnr said.