Police are appealing for public assistance to help locate missing teenager Sampson.
The 14-year-old was last seen in Montmorency about 11am this morning.
Police and family are concerned for Sampson due to a medical condition.
An image of Sampson has been released in the hope someone recognises him and provides information on his current whereabouts.
Sampson is described as Caucasian, 170cm tall with blue eyes and dyed black hair.
He was last seen wearing a black hoodie, black puffer jacket, black pants with black and white stripes and Nike runners.
It is believed he may be frequenting the Montmorency, Greensborough, Eltham, Diamond Creek and Watsonia areas.
Anyone who sites Sampson or with information about his whereabouts is urged to call Greensborough Police Station on 8432 0200.