Police were approached by a man with a gunshot wound on Collins Street at around 6.30am today, a Victoria Police spokesperson confirmed.
The man, aged in his 20s, was taken to hospital where he was treated for non-life threatening injuries.
A crime scene has been established at Collins Street as police probe the incident.
The circumstances surrounding the shooting remain unknown.
An investigation is ongoing.
Anyone who witnessed the incident, has footage or any other information is urged to contact Crime Stoppers on 1800 333 000.