Police are appealing for public assistance to help missing Deer Park boy Dylan Russell.
The 15-year-old was last seen in Werribee on Thursday.
Dylan is known to frequent the Bendigo, Castlemaine, Kangaroo Flat, Werribee and Melton areas.
Police and family have concerns for his welfare due to his age.
Dylan is described as Caucasian, about 172cm tall, with light brown short hair.
He was last seen wearing black trackpants, a black t-shirt and black shoes.
Investigators have released a photo of Dylan in the hope someone may recognise him and be able to provide information on his whereabouts.
Anyone with information is urged to contact Keilor Downs Police Station on 9365 3333.