Police are called to the Paniyiri Greek festival at Musgrave Park in South Brisbane after reports of a large brawl involving up to 100 youths. Multiple outlets report the incident occurs just before 9pm, with officers responding following allegations that patrons were assaulted during the disruption. The reports describe a chaotic scene at the festival, prompting police attendance to manage the crowd and investigate what happened. The coverage indicates the fight or scuffle escalated quickly enough to draw police intervention, and that the number of youths involved could be as high as 100. Authorities are expected to review witness accounts and assess any CCTV or other evidence gathered at the venue. The outlets do not provide further details in the supplied text on arrests, specific injuries, or the identities of those involved. Further information may emerge as police complete their assessment of the incident.