A 64-year-old man sustained facial injuries after being assaulted in Cleckheaton.
The incident occured around 10.15pm on Friday at the Old Park Horse public house, Highmoor Lane, where the man was assaulted causing him to fall.
The victim received facial injuries.
Detective constable Sarah Umperville from Kirklees CID said: “There were a large number of people in the public house on Friday night and I would appeal to anyone who witnessed the incident, or who has any information to come forward. Enquiries are ongoing.”
Anyone with information is asked to contact DC Sarah Umperville at Kirklees CID via 101, or Crimestoppers anonymously on 0800 555 111.