A fight broke out at Northland Shopping Centre in Preston in the city’s north on Sunday afternoon, police have said.
Three people, all allegedly involved in what investigators claim was a premeditated fight between rival youth gangs, were hospitalised.
Six people had previously been charged, with police confirming yesterday they were seeking one more person of interest.
Last night, police said an 18-year-old Thornhill Park man had been arrested, making him the seventh person charged in connection with the incident.
He was charged with affray and weapons offences.
He was remanded in custody and will appear in court today.
Police have also seized three edged weapons during the investigation.
Those arrested are aged between 15 and 21. All are known to police and remain before the courts.