Police are hoping to identify nine men following a large street brawl in Melbourne's CBD earlier this year.
The incident occurred on Flinders Street, near Batman Avenue bridge, about 10.30pm on Australia Day, Friday 26 January.
Police have been told two groups - who had been supporting opposing teams at a soccer game - became involved in a physical altercation while making their way towards Flinders Street Railway Station after the game.
Five security marshals, who were escorting one group, attempted to break up the brawl which extended towards Russell Street.
Two of them - a 38-year-old man and 39-year-old man from New South Wales - were treated by paramedics at the scene after sustaining injuries to their face.
Due to the large number of people involved, believed to be approximately 50, detectives from the North West Metro Regional Crime Squad picked up the investigation last month.
Detectives have so far made extensive enquiries into the incident and are today releasing images of nine men they want to identify.
They're hoping the men, aged between 18 and 30, will be able to assist with their investigation.
Detectives are also calling for potential victims - who in CCTV footage look to have sustained injuries - to come forward to police.
This includes anyone involved who may be from New South Wales.
Investigators are also keen to speak with anyone who may have witnessed the incident or have CCTV/dashcam footage.
No arrests have been made at this stage.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or via www.crimestoppersvic.com.au.
Quotes attributable to North West Metro Regional Crime Detective Inspector Geoff Owen:
"This kind of behaviour is just not OK.
"We all know a split second decision to be violent can result in life-altering consequences.
"That's why we are taking this so seriously. To send a clear message to those who think they can conduct themselves in this way and get away with it.
"If you or someone you know was assaulted during the incident please come forward and contact police. It is not too late."