That's from the province's police boss, Tep Puri today.
Puri said the riots in Kiunga resulted from a fight between locals which started on Wednesday.
He said police were called in to stop the fight and one officer fired warning shots to disperse the crowd.
"Pellets from the officer's gun hit two people. Both were taken to hospital and one has since been discharged," Puri said.
He said the officer that fired the warning shot has been arrested and his weapon confiscated for further investigation.
Detectives will be flown to Kiunga to continue investigations.