Valdo Amissão Mendes Calocane, 31, in custody over the deadly attacks.

Police said on Thursday the suspect had been a student at Nottingham University, where two of the victims were studying.

His name appears on a list of Mechanical Engineering students who graduated last year.

Officers said they did not think this was connected to the killings.

Nineteen-year-old University of Nottingham students Grace O'Malley-Kumar and Barnaby Webber were found stabbed to death in Ilkeston Road at around 4am on Tuesday.

Caretaker Ian Coates, 65, was then found dead in Magdala Road after his van was allegedly stolen by the suspect.

Nottinghamshire Police said a man also remains in a serious condition in hospital after the vehicle was driven at him in Milton Street.

The force has referred a further incident to the Independent Office for Police Conduct watchdog after a marked police car followed the van for a short distance before it struck another two pedestrians in Sherwood Street.

Read more:
A timeline of how 'major incident' unfolded
Victims' families speak at vigil

Meanwhile, tributes have been paid to the victims of the deadly rampage, which has sent shockwaves through the city.

Medical student Miss O'Malley-Kumar, who played for England under-18s hockey team, was hailed "a truly wonderful young lady" who was "resilient and wise beyond her years", while the family of history student Mr Webber said the teenager was a "bright young man" who was "a talented and passionate cricketer".

The sons of Mr Coates, who was four months away from retirement, described the "massive football fan" as a "great father".

At an emotional vigil on Thursday evening, the mother of Mr Webber urged people to "hold no hate" in the wake of the attacks.

Home Secretary Suella Braverman visited Nottingham to pay her respects and lay a wreath with a hand-written message which read: "In memory of those who lost their lives, those who were injured and everyone who loves them.

"We are with you and with all the people of Nottingham."