A teenage girl has been sexually assaulted on a jet ski at a Melbourne beach after the rider took her out to sea, with police concerned this may be one of several similar incidents.
The 15-year-old was at Altona Beach on the pier with her friends when a man on a red jet ski drove up to the group and offered to take her for a ride about 6pm on November 27.
The victim accepted and the man rode the jet ski into deeper waters far from the shore where he sexually assaulted the girl before returning her to her friends.