Mandurah Detectives have charged another four teenagers after a brawl with more than 30 juveniles occurred at a Secret Harbour shopping centre on Tuesday.
Police are investigating the fight which happened about 4pm on Tuesday, outside the Woolworths shopping centre in the Secret Harbour Square.
Three people were injured and treated at the Peel Health Campus.
A 14-year-old boy from Secret Harbour has been charged with one count of taking part in a riot.
A 16-year-old boy from Baldivis has been charged with one count of taking part in a riot
A 14-year-old boy from Port Kennedy has been charged with one count of taking part in a riot, one count of stealing and one count of carried (possessed) an article with intent to cause fear that someone will be injured or disabled.
These boys are all due to appear in Rockingham Children's Court on Wednesday, May 15.
A 15-year-old boy from Golden Bay has been charged with one count of taking part in a riot
He is due to appear in Rockingham Children's Court on Wednesday, June 5.
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Mandurah Detectives are also seeking further assistance regarding the April 30 incident.
They are looking for a boy they wish to identify, who they believe can assist them with their investigation into the assault of a 52-year-old man.
The boy is described as fair skinned with a slim build.
He was last seen wearing a black t-shirt, black shorts, a cap and dark coloured shoes with a red motif.
Anyone who may be able to identify this boy, or anyone with information regarding the incident is asked to contact Crime Stoppers on 1800 333 000 or make a report online at crimestopperswa.com.au.
People providing information to Crime Stoppers may remain anonymous if they wish.