Police are hunting for three men afer a horrible random attack in Frankston.

CCTV footage shows three men walking past a man in a light grey jumper, before one man violently attacks him, and continuing to walk off just as if nothing had happened.

Police are still looking for the both the victim, and his attacker, and are concerned of the victim's wellbeing, after sustaining potentially serious head injuries.

Anyone with information should contact Crime Stoppers on 1800 333 000.

Police are hunting three men over a random, sickening attack on an innocent man in Frankston. #9News pic.twitter.com/XEyzz1qLme

— Nine News Melbourne (@9NewsMelb) July 29, 2018