Sixteen of them arrested on 28 April have been charged and will appear in court to stand trial on 17 May.
The charges are disorderly conduct, public disturbance, and fighting on public vehicles.
Police Spokesperson Superintendent, Sua Muliaga Tiumalu says their riot operation has been active and it included a search of Malua fou College for weapons.
"The situation has been handled by police with drastic measures. We visited the schools and did searches and that’s where some of the arrests came from," he adds.