Bandits armed with a handgun stole a mobile phone from two teenage boys in Dandenong.
The victims, aged 17 and 18, were walking on the footbridge over the Princes Highway between Hemmings Park and Dandenong High School about 8.40pm on Wednesday 20 June.
Police said three men of African appearance approached and one produced what it believed to be an imitation handgun.
One of the victims handed over his iPhone and the trio fled the scene.
Call Crime Stoppers on 1800 333 000 with any information.