A man needed hospital treatment after being assaulted in Aylesbury during the early hours.
The 28 year old was attacked in Exchange Street at 12.45am on Saturday.
His face was injured and he was taken to hospital, but has since been discharged.
DC Jemma Tamplin appealed to any witnesses to the assault or anyone who has any information to contact police.
Call police on 101 or Crimestoppers anonymously on 0800 555 111.