A 43-year-old beggar who was attacked in Manchester city centre almost two weeks ago has died in hospital.
Mr Cockerill died in hospital on Wednesday
David Cockerill was punched after he approached two men for money in Piccadilly Gardens on 23 September.
Mr Cockerill, originally of Scunthorpe, North Lincolnshire, suffered a serious head injury. He was taken to Hope Hospital where he died on Wednesday.
Detectives have launched a murder inquiry and are asking anyone with information to contact them.
One of the men is described by police as of Eastern European origin, 5ft 8ins to 5ft 9ins tall, aged 26 to 28, of athletic build with very short black hair and dark features.
He wore a camouflage jacket with dark blue jeans and was clean-shaven.
The other man is described as mixed race with light skin, 5ft 10in tall, aged 23 to 25, thin build and was clean-shaven with a long face.
He was wearing a beige or white anorak with a hood which came below his waist.
Det Insp Alistair Mallen from Bootle Street CID said: "We are now treating this as a murder inquiry and I'd appeal to anyone who may have seen the assault on David on that Saturday night to contact us immediately.
"This may have looked like a minor altercation, but sadly David has now died and we need to find out exactly what happened.
"I would particularly like to appeal to the two people that David approached and would encourage them to come forward so we can find out their version of events."