A man suffered a fractured cheekbone and broken nose after being attacked by a gang of four men close to Milton Keynes Hospital on Saturday.
Police are appealing for information following the assault which happened as the man was walking along the redway path leading from the Eaglestone estate towards the hospital at about 3.20pm.
The victim was punched in the head, face and body, and suffered a suspected fractured cheekbone and broken nose.
The men were black and aged between 18 and 25-years-old. They were all of average build and between 5ft 8ins and 5ft 10ins tall.
Anyone with information on the incident is asked to contact investigating officer detective constable Lucy Jarrett from Milton Keynes Force CID on 101.