POLICE are investigating the circumstances surrounding a fight at a gathering in Mount Martha on 14 October.
It is alleged a fight broke out when a group of males who arrived at the gathering at about 10.30pm were told to leave.
One of the victims, a 19-year-old male was taken to hospital, where he required surgery for his injuries.
Anyone with information, who has CCTV of the incident, mobile phone video recorded footage, or who may have witness the incident is urged to contact Crime Stoppers on 1800 333 000, or submit a confidential report online at www.crimestoppersvic.com.au