A woman found dead in a Melbourne hotel room after a buck's party is yet to be identified.
Four men from the Australian Capital Territory and New South Wales have been released from police custody without charge, after they were arrested following the discovery of the woman's body in the Oaks on Market serviced apartment about 8am yesterday.
Police have been running forensic tests and an autopsy was performed overnight to identify the woman and her cause of death.
Homicide detectives believe the woman is aged in her 20s and say she was wearing a black, long-sleeved top, blue denim shorts and white running shoes.
The buck's group told 9NEWS they attended a football match before partying at Inflation Nightclub on King Street and returning to the hotel.
The group of about 11 men had rented three apartments on three levels of the hotel. The woman's body was found on Floor 10.