AN investigation is under way as police try to find those involved in the ethnic clash at the 9-Mile settlement on Sunday that left one dead and two injured, The National reports.
NCD metropolitan commander Supt Joseph Tondop said police had been deployed to the area to control and monitor the situation.
Tondop said they were investigating the clash and were collecting statements from eyewitnesses.
He said, hopefully, by the end of the week they would make some arrests.
Tondop said there were no major criminal incidences reported over the weekend other than the violent clash.
Assistant police deputy commissioner, Fred Yakasa, said incidences like the 9-Mile fight often tested our resolve to remain united and uphold the Christian values we cherish.
"Ours is a strong democratic nation with diverse cultures but yet so united," police said.
"Our Constitution and democracy are testimonies that God loves this country.
"From pre-colonial times to what we are today, we, through our Melanesian practices and customs, relate ourselves as one nation boasting a togetherness that never exists anywhere else in the world.
"PNG being a Christian country values love for one another as the fundamental tenet for all other forms of development.
"The greatest commandment the Lord Jesus Christ taught us: Love one another as you love yourself.
"So such ethnic clashes threaten our unity as one nation and adversely affect businesses."