Police are appealing for information after a man suffered serious head injuries outside a nightclub in Bingley in the early hours of this morning.
At 3.32am, police were contacted by the ambulance service who had been called to an injured man outside Bijou nightclub, in Chapel Lane.
A 24-year-old man was taken to hospital with head injuries and remains in a serious condition.
Four men, aged 23 to 31, have been arrested in connection with the incident and are currently in custody.
Enquiries into the incident are ongoing and anyone who witnessed it is asked to contact Bradford District CID via 101 quoting crime number 13170551254 or call the independent charity Crimestoppers anonymously on 0800 555 111.