A man was knocked unconcious and suffered a fractured skull in a city centre attack.
The victim was walking along Clifford Street with his brother at about 2.35am on Saturday 8 December.
The offender approached him and punched him in the head.
The victim fell to the floor and lost consciousness. He was transported via ambulance to York Hospital where he was treated and later discharged.
He sustained a skull fracture and a bleed on his brain.
Do you know them?
The offender is believed to have been with two other men and a woman before the assault occurred.
A North Yorkshire Police spokeswoman said: “We are requesting the public’s assistance to help establish any witnesses and identifying the people seen in the CCTV images.”
If you recognise them or have any information that could assist the investigation please contact North Yorkshire Police.
How to help the police
| Call North Yorkshire Police on 101, select option 2 and ask for Georgia Ladly | |
| Contact Crimestoppers anonymously on 0800 555 111 or via the website |
| Email Georgia Ladly here | |
| Quote reference number 12180228107 |