Homicide Squad detectives are investigating a fatal stabbing in Oakleigh last night.
Emergency services were called to Atherton Road around 7.55pm, following reports of a fight between a group of people.
A 20-year-old Springvale man died at the scene.
Police arrested a 15-year-old Dandenong teenager, a 20-year-old Dandenong South man and two 19-year-olds, from Lynbrook and Lyndhurst.
They have since been released pending further enquiries.
Police are also appealing for anyone who may have been in the area of Chester Street, Eaton Mall and Atherton Road between 7.30pm and 8pm that may have camera footage to come forward.
The investigation remains ongoing and anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential crime report at www.crimestoppersvic.com.au