Police have arrested a 28-year-old Berwick man following the death of a man in Hampton East on Sunday 21 January.
Police also arrested a 27-year-old Hampton East man and a 25-year-old woman of no fixed address, with the trio now assisting police with their enquiries.
Emergency services were called to an address on Wickham Road at about 3.45pm on Sunday 21 January, after a 33-year-old Ashburton man was located unresponsive.
The man was then transported to hospital with life-threatening injuries, where he later died.
Police believed the parties were known to each other.
The exact circumstances surrounding the incident are yet to be determined and the investigation is ongoing.
To report any information, contact Crime Stoppers on 1800 333 000 or visit www.crimestoppersvic.com.au