Police are appealing for public assistance to help locate Samuel St John.
A warrant has been issued for the 18-year-old over an alleged armed robbery.
St John is described as 180cm tall with brown eyes, solid build and a dark complexion.
He is known to frequent the Prahran, South Yarra, Malvern and Malvern East areas.
Investigators have released an image of St John in the hope someone may have information on his current whereabouts.
Anyone who sights St John or has information about his whereabouts is urged to contact Crime Stoppers on 1800 333 000 or make a confidential report at www.crimestoppersvic.com.au