Police are appealing for public assistance to help locate missing Kallista man Zak.
The 22-year-old was last seen on Norton Road, Kallista, on the evening of 28 April.
Police and family have concerns for Zak due to his disappearance being out of character and him having a medical condition.
Zak is described as Caucasian in appearance, 170cm tall, of medium build with short blond/brown hair and possibly a moustache.
He was last seen wearing a grey jacket, mustard-coloured t-shirt, navy tracksuit pants and black shoes.
Police have released an image of Zak in the hope that someone can provide information on his current whereabouts.
Anyone who sights Zak is urged to contact Belgrave Police Station on (03) 9754 6677 or call 000.