Police in Papua New Guinea's third largest city Mt Hagen have staged a protest in response to last Saturday's killing of a senior police constable.
The Post Courier says the protest through the city's main streets reportedly caused fear and prompted businesses to remain shut.
Senior Constable Allan Ani was killed by passengers of a small bus after a light collision between the bus and police vehicle at Warakum.
Six people, including two women, have been arrested over the killing.
The Mt Hagen police station has remained closed to the public while other government agencies raised concerns about the manner local tribes attacked public servants.
On Sunday, police showed their frustration by felling shade trees and plants that lined the median strip in the city centre, spilled rubbish on the streets and discharged firearms.