Knock out punch witnesses wanted

A man was punched unconscious while walking down a Dandenong street, police allege.
They were called to Hutton and Cadle streets about 10.10pm on Monday 16 October.
A 49-year-old Dandenong man was unconscious on the footpath and was taken to Dandenong Hospital for observation.
His alleged attacker was described as aged in his forties with a shaved head, and might have been shirtless.
Police are appealing for any witnesses to call Crime Stoppers on 1800 333 000.