Update:  Police are continuing to interview three people in relation to the discovery of a man’s body in Melbourne’s west on Saturday morning.

Homicide detectives were called to a Phillip Street house in Melton South property after the man was found with what police reported as a gun shot wound about 2.10am.

Four people -  two women and two men - were taken into custody at about 7am to undergo questioning.

One of those people, a woman, was released shortly afterwards.

Three people - a 48 year-old man, 58 year-old woman and 37 year-old man - remain in police custody.

Police are treating the death as suspicious.

Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or visit crimestoppers.com.au