A 47-year-old man was taken to hospital with head injuries after he was assaulted at the Piccadilly pub in Caerphilly town.
Gwent Police is appealing for information after the incident on Friday October 12 at about 1am.
Police said the victim suffered head injuries and was taken to Cardiff’s University of Wales Hospital for treatment. He has since been released.
Anyone who may have witnessed the incident is asked to contact police on 101 or Crimestoppers anonymously on 0800 555 111.