Detectives from Frankston Crime Investigation Unit are investigating a non-fatal stabbing that occurred in Seaford last month.
Investigators have been told the victim, an 18-year-old Seaford man, was at the beach with a group of friends on the evening of Thursday 19 November.
He was approached by a man who was not known to him and the man shouted at him before stabbing the victim to the stomach, in what police describe as an unprovoked attack.
The man, along with an associate who was waiting nearby, fled east towards Station Street and then north along the railway tracks.
The first man had a solid build and was approximately 186m tall.
He was wearing a two-tone green and dark blue hi-vis polo top, dark pants and white socks.
The second man is believed to be approximately 180cm tall with a slim build and was wearing a black Hilfiger t-shirt, dark knee-length shorts and a dark coloured cap.
He was unshaved and had short dark hair.
The victim was taken to hospital with serious injuries where he remained for a number of days.