COLAC police are appealing for witnesses after a 32-year-old man was viciously assaulted near the intersection of Murray and Corangamite streets during the early hours of Sunday morning.
Detective Senior Constable Mick Palmer, of the Colac police crime investigation unit, said the man was near the corner about 1am when he was assaulted by up to two assailants.
The victim was knocked unconscious and taken to Colac hospital for treatment.
"We would urgently like to speak to anyone who saw anything about that time in that area or anyone with information about this vicious assault," Detective Senior Constable Palmer said.
"Anyone with information is requested to contact the Colac police station or Crime Stoppers on 1800 333 000," he said.