A murder investigation has been launched after a man was stabbed to death in Nottingham City Centre.
The victim, in his 20s, was attacked at approximately 7.40pm on Saturday evening.
Police believe his attacker was known to him.
Nottinghamshire Police said the incident took place on Union Road and, despite police and ambulance crews arriving almost immediately, the victim died at the scene.
A man has been arrested on suspicion of assisting an offender.
Family members of the victim are being supported by specially trained officers to come to terms with the “devastating reality” of the killing, said Detective Inspector Justine Wilson.
Those travelling through the city centre were warned to expect traffic and public transport disruption as a cordon remained in place.
DI Wilson, leading the investigation, said officers, detectives and forensics alike were working “tirelessly” to investigate the “very serious case.”
She said: “While we believe those involved in this assault are known to one another, we understand the level of concern that incidents of this nature cause our communities.
“Most of all, my thoughts are with the family of the victim who are now facing the devastating reality of coming to terms with the fact that their loved one has lost his life on our city’s streets.
“That, quite simply, is not acceptable and our efforts are now fully focused on understanding how this man came to lose his life – as well as identifying those responsible for his death.”
Police have released an urgent appeal for members of the public to come forward with any relevant information, asking them to call Nottinghamshire Police on 101, quoting incident number 812 of September 14.