Casey Crime Investigation Unit detectives have charged five people following an alleged assault at a swimming pool in Narre Warren last month.
It is alleged a 19-year-old male lifeguard on duty was approached and assaulted by a group of youths around 5.50pm at the Park Road premises on Sunday, 19 January.
He sustained non-life-threatening injuries and was taken to hospital for treatment.
On Sunday, detectives executed search warrants at properties in Cranbourne North and Narre Warren South.
A 19-year-old man and an 18-year-old man, both from Cranbourne North, were arrested at the scene.
They were charged with affray and assault and bailed to appear at Dandenong Magistrates' Court on 23 May.
Three teenagers were also arrested during the search warrants.
Two 17-year-old boys from the Casey area have been charged with affray and assault.
Both have been bailed to appear at a children's court on 3 March.
A 15-year-old boy from the Casey area was released pending further enquiries.
Yesterday afternoon, an 18-year-old Cranbourne North man self-presented to Narre Warren police station.
He has been charged with affray and assault and bailed to appear at Dandenong Magistrates' Court on 23 May.
