A man suffered potentially life-changing injuries after he was punched unconscious during a 'brutal attack' in Rochdale.
The victim, aged 37, was approached by three men on South Parade in the town centre over the weekend.
Police said the group became involved in an 'altercation'.
The man was punched in the side of the head, knocking him unconscious.
Officers were called to the scene at 12.30am on Sunday morning (September 13).
The victim was taken to hospital with what are believed to be potentially life changing injuries, a GMP spokesman said.
He remains in hospital in a stable condition.
A man, aged 36, was arrested on suspicion of grievous bodily harm.
He remains in custody for questioning.
Detectives are appealing for witnesses to come forward following the assault.
Det Sgt, David Read of GMP's Rochdale Division said: "This was a seemingly unprovoked but brutal attack in which a man has sustained potentially life changing injuries.
"Although we have arrested one man, our investigation remains ongoing and we want to take this opportunity to appeal to anyone who may have seen this incident take place. This was a busy street and we are sure people must have witnessed the assault.
"Were you on South Parade at the time or did you see the group before or after the assault? Please get in touch if you have any information that could assist us in our enquiries."
Anyone with any information is asked to contact police on 0161 856 8635 quoting incident number 121 of September 13, or Crimestoppers, anonymously, on 0800 555 111.
