Westgate Sexual Offences and Child Abuse Investigation Team (SOCIT) detectives have arrested three men following an investigation into a sexual assault that occurred at Altona beach last year.
A 40-year-old Meadow Heights man, a 37-year-old Meadow Heights man and a 29-year-old Broadmeadows man were arrested in relation to the matter.
The men have been interviewed and released pending further enquiries.
The arrests follow an appeal regarding an incident that occurred on 27 November at Altona beach.
It is alleged that four females aged between 12-16-years-old were approached by a man on a jet ski who offered to take them for a ride.
The victims were taken on the jet ski into deeper waters far from the shore where they were sexually assaulted before being returned to the beach.
Investigators would like to thank the public and media for their assistance and the investigation is ongoing.