Detectives investigating an assault in Leicester centre which left a man with serious injuries have arrested a man.
East Gates where the attack took place.
A 36-year-old man is undergoing treatment in hospital after he was assaulted outside McDonalds in East Gates at around 10.45pm on Friday.
A police spokesman said: "From enquiries conducted so far it's believed that the victim intervened during an argument between two men.
"One of the men punched the victim and he was knocked unconscious."
The victim was initially taken to the Leicester Royal Infirmary but later transferred to the Queen's Medical Centre in Nottingham where his condition has been described as serious.
A 23-year-old man has been arrested on suspicion of grievous bodily harm and is currently in police custody.
Police have issued an appeal for witnesses to come forward.
A police spokesman said: "We would still like to speak to anyone who was in East Gates on Friday night and witnessed the assault or the events leading up to it.
"If you can help with our enquiries please contact DI 160 Paul McKinder on 101, quoting incident number 759 of May 13."