Police were called shortly after midnight on Saturday 26 September to a report of an incident at the rear car park of the Acton public house in Wrexham, whereby a 39-year-old man had been assaulted.
He was taken by Ambulance to Wrexham Maelor Hospital and was later transferred to Walton Hospital suffering serious head injuries. His condition is described as poorly.
Subsequently a 35-year-old local man was arrested in connection with the offence. He is currently in custody at Wrexham Police Station.
Police are appealing to anyone who may have been in the Acton public house at the time of the incident to contact Wrexham CID on 101 if in Wales, 0845 6071001 (Welsh line), 0845 6071002 (English line), Crimestoppers on 0800 555111 or text 66767