Warwickshire Police arrested a 22-year-old man from Shipston-on-Stour in the early hours of Sunday morning on December 29, on suspicion of a serious assault.
The incident which occured inside or near a pub in Church Street, Shipston, was reported to police at 4.20am on the same morning. Following the incident a man was treated for a deep gash to his head and a suspected dislocated shoulder after he was taken by ambulance to Warwick Hospital. He later required surgery to the head injury at University Hospital Coventry & Warwickshire.
Following questioning, the man was released on conditional bail pending further police enquiries.
Any witnesses are asked to contact PC 1899 Patrick Schram at Warwickshire Police on 101 or independent charity Crimestoppers anonymously on 0800 555 111.