A man was taken to hospital after being assaulted in Stony Stratford on Saturday.
Between 1am and 2am, the 23-year-old was walking through the High Street when two men approached and punched him, knocking him over, before running off.
There is no description of the offenders and the attack appears to have been unprovoked. The victim was taken to Milton Keynes Hospital for treatment to facial injuries.
Any witnesses can call police on 101 or Crimestoppers, anonymously, on 0800 555 111.