Convicted sex offender who escaped Melbourne treatment facility reportedly spotted in Kew

A sex offender with dollar sign tattoos on his leg and a rat-tail hairstyle who escaped from a Melbourne mental health treatment facility last night was reportedly spotted in Kew this morning.

Christopher Austin, 22, was on a five-year residential placement order at the Disability Forensic Assessment and Treatment Service, for sexual assault, when he absconded about 11.30pm yesterday.

Authorities said a man fitting Austin’s description was spotted riding a mountain bike along Main Yarra Trail in Willow Grove about 6am today, wearing shorts and a jumper,

Earlier today, police said Austin has "an interest" in Mildura and may be headed there.

Police have released an image of Austin, who has an intellectual disability, and have warned members of the public not to approach him.

"He's high risk, possibly violent, that's why I've asked the public, don't go near him, just notify police through triple-zero," Supt De Santo said.

Austin is described as being 166cm tall, with a medium build and short dark hair.

Anyone with information is urged to contact Crime Stoppers on 1800 333 000.