Ambon, Maluku – Angry residents attacked a police post in Nusaniwe, Ambon, with stones Saturday upon learning a man was killed in a fight with police.

The dead man, identified as Denny Leuwol, had been in Nusaniwe to join Independence Day celebrations. His friend, Oni Siwabessy, was seriously injured in the incident. A second group of residents protested at the provincial police headquarters.

"The three officers who were involved in the brutality have been detained. If they are found guilty, they will be punished in line with the prevailing laws," Maluku Police chief Brig. Gen. Guntur Gatot Setyawan said.

Guntur said the suspects had been on duty at the time of the incident and could be discharged.

The protesting residents said the fight started after Denny's motorbike crashed into the officers' car, while the officers said Denny had challenged them.

"The case demands serious attention. The police should not protect guilty officers," said Hans Manuhutu, who comes from Denny's village.