Police said intervention at a major public gathering may have prevented serious violence.
The incident has added to community concern about weapons, youth offending, event security and the resources available for preventive policing.
Vic Premier Must GoPolice arrests at a busy public event have prompted further debate about youth crime, weapons and preventive policing.

Police said intervention at a major public gathering may have prevented serious violence.
The incident has added to community concern about weapons, youth offending, event security and the resources available for preventive policing.