Wyndham Crime Investigation Unit detectives are investigating an alleged assault which occurred in Werribee back in December.
Investigators have been told a number of people were at a house party in Edwards Road about 11.50pm on December 10, 2016.
A man and a woman left the party and were involved in a physical altercation which resulted in the man hitting the woman and her falling to the ground.
A number of bystanders ran to the pair and a further fight involving 20-50 people ensued.
Police have been told that three people were taken to hospital with serious injuries but believe a number of others were injured.
Investigators are keen to speak to anyone who witnessed the affray or with further information about the incident.
Anyone with any information is urged to contact Crime Stoppers on 1800 333 000.
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