Police are appealing for public assistance to help locate missing teenager Mohammad Alnajar.
The 15-year-old is from Craigieburn and is known to wear a black Adidas hooded top, black track pants and a white trucker cap and has short black hair.
He is known to frequent the Werribee and Point Cook areas and rides his bicycle.
Police and family members hold concerns for his welfare due to his age.
An image of Mohammad has been released in the hope someone recognises him and can provide information on his whereabouts.
Anyone who sees Mohammad or has information on his whereabouts is urged to contact Werribee Police Station on 9742 9444.