A Nottingham man has died in hospital after a stabbing incident in a city centre nightclub.
Four men have been arrested in connection with the attack
The victim, who was in his twenties, was attacked at around 0240 BST on Sunday at the Cuba Libra nightclub on Greyhound Street.
He died from his injuries at the Queen's Medical Centre.
Four people have been arrested in connection with the attack - but the police want to speak to anyone who was at the club at the time.
Both King Street and Greyhound Street were closed to the public on Sunday morning while a forensic investigation was carried out.
Police have set up an incident room at Radford Road police station and are appealing for witnesses.