Officers were called at around 11.10 am Monday morning 26 June and responded to the scene of crime in minutes.
The police upon arrival arrested a man at the scene on suspicion of murder and remains in police custody.
Despite the best efforts of emergency services, a man in his 30s died at the scene and a scene remains in place while investigations continue.
Chief Constable Kate Meynell, of Nottinghamshire Police, said: “What happened at Highbury Vale is tragic and has resulted in the death of a man in his 30s.
“We know there were other passengers on board at the time and understand how frightening this must have been for anyone who saw what happened. Our officers were at the scene quickly and detained a suspect. He remains in police custody.
“This was an isolated incident and we are not looking for anyone else in connection with what happened this morning.”
The identities of both the suspect and the victim have not yet been released as the investigations are still going on.
Police, therefore, are pleading with anyone who may have any information or mobile phone footage, asking them to contact 101, quoting incident number 274 of 26 June 2023, or call Crimestoppers anonymously on 0800 555 111.
The Police further say members of the public with information can also submit this through the Major Incident Public Portal.
“What happened at Highbury Vale is tragic.”Chief Constable Kate Meynell,