Maroondah Crime Investigation Unit detectives have charged a teenager following an alleged armed robbery in Heathmont this morning.
Officers have been told a teenager got out of a Volkswagen hatchback in the middle of Edna Street and confronted a 14-year-old boy about 7.25am on Friday, 8 May.
The teenager was allegedly armed with a knife and made demands for the boy's phone, before two other unknown males also exited the Volkswagen.
A passer-by stopped their car and offered assistance to the boy, before the trio returned to the Volkswagen and fled the scene.
No one was physically injured during the incident.
A 15-year-old Wantirna boy has subsequently been charged with theft and handle stolen goods.
He was bailed to appear before a children's court at a later date.
The investigation into identifying the other males involved continues.
Anyone with information, dashcam/CCTV footage or who witnessed the incident is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au.