One person is also in a critical condition after a van drove at people in the city centre.
A 31-year-old man has been arrested on suspicion of murder as police say they are keeping an open mind about the motive.
Here’s a timeline of how the attacks unfolded.
Just after 4am – Two students stabbed in Ilkeston Road
Two young people are found dead by police following a call from a member of the public.
A witness told the BBC he saw a young man and young woman being stabbed and heard “awful, blood-curdling screams”.
“I saw him stab the lad first and then the woman,” the witness said.
“It was repeated stabbing – four or five times. The lad collapsed in the middle of the road.
“The girl stumbled towards a house and didn’t move. The next minute she had disappeared down the side of a house, and that’s where they found her.”
Image: Student Barnaby Webber was killed
Image: The students were stabbed in Ilkeston Road
5.30am – Van drives into people in Milton Street
A van tries to run three people over in the city centre, just over a mile from Ilkeston Road.
One witness, Frances, told Sky News she was on her way to work when she heard a bang that sounded like a car hitting a bollard.
Image: Police officers at Nottingham’s Theatre Royal, near where the van hit people
“I turned around and then saw the two people on the floor, on the road,” she said.
“Someone was screaming, I think a gentleman ran over to help as well.
“The van was still there, and then moments later the van took off and then the police arrived.
“I ran over to see how the two people were, just to see what I could do to help.
Image: Police forensics officers search the van on the corner of Maples Street and Bentinck Road
“There was a male and a female. The female – she could speak, she was in pain from the impact of hitting the ground. She had hit her head as well. She was still able to speak.
“The gentleman, I think, took the full brunt of the van, and he had head injuries but was still awake, he didn’t lose consciousness at that stage.”
Three people were injured and one of them was in a critical condition.
Around 5.30am – Man arrested in Bentinck Road
People living in Bentinck Road, about 1.5 miles from Milton Street, said police dragged a man out of a white van.
Footage showed a man being detained outside a convenience store.
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0:28
Nottingham attack: Moment of arrest
Demi Ojolow, a student who lives in the road, said: “I just saw the police shouting at him to get out of the car and get on the floor.
“And they dragged him out of the car and he just fell on the floor. He was still pretty wrestling at the point.
“They dragged him away and that was about it.”
Ms Ojolow said police were pointing some kind of weapon at the man – it’s later confirmed that he was tasered.
7.04am – Police declare ‘serious incident’
The first official announcement came from Nottingham Police, who said emergency services were at an “ongoing serious incident”.
They asked people to avoid road closures in the city centre.
9.37am – Arrest of suspect announced
Police confirm a man, 31, has been arrested in suspicion of murder.
Shortly before 1pm – Armed police take away two women
Two women were taken away in a police van from Ilkeston Road – the site of the student stabbings.
A witness told Sky News that armed officers, some wearing balaclavas, were on the road a few hundred yards above the main cordon.
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2:16
Suspect used victim’s van to drive at three people, – police chief
Police appeared to enter a commercial property in the street, with the two women eventually put in the back of a marked patrol car.
6pm – Police say suspect killed man and used van as weapon
Chief Constable Kate Meynell tells reporters they believe the van used to drive into people was stolen from one of the victims, a man in his 50s.
A member of the public found him dead from knife wounds in Magdala Road.
7.30pm– One of the victims is confirmed as 19-year-old University of Nottingham student Barnaby Webber.
It comes shortly after hundreds of students attended a church vigil where flowers were left and many people were in tears.
A card left in the church was made out to ‘Grace’ – but the identities of the other people killed have not yet been confirmed.
It started with a strong espresso in a simple cafe on a side street in north London.
Several Algerian men were inside, a few others were outside on the pavement, smoking.
I’d been told the wanted prisoner might be in Finsbury Park, so I ordered a coffee and asked if they’d seen him.
Image: Spotting a man resembling the suspect, Tom and camera operator Josh Masters gave chase
They were happy to tell me that some of them knew Brahim Kaddour-Cherif – the 24-year-old offender who was on the run.
One of the customers revealed to me that he’d actually seen him the night before.
“He wants to hand himself to police,” the friend said candidly.
This was the beginning of the end of a high-profile manhunt.
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The Algerian convicted sex offender had been at large since 29 October, after he was mistakenly released from HMP Wandsworth in south London.
Within an hour of meeting the friend in the cafe, he had followed myself and camera operator Josh Masters to a nearby street.
Image: Kaddour-Cherif was accidentally freed five days after the wrongful release of convicted sex offender Hadush Kebatu (pictured). They were both arrested separately in Finsbury Park. Pic: Crown Prosecution Service/PA
We weren’t yet filming – he didn’t want any attention or fuss surrounding him.
“Follow me, he’s in the park,” the man told me.
“Follow – but not too close.”
We did.
I was in the same park a few weeks ago after fugitive Hadush Kebatu, the Ethiopian sex offender – also wrongly released from prison – was arrested in Finsbury Park.
It was odd to be back in the same spot in such similar circumstances.
As he led us through the park past joggers, young families and people playing tennis, the man headed for the gates near Finsbury Park station.
All of a sudden, two police officers ran past us.
The Met had received a tip-off from a member of the public.
It was frantic. Undercover officers, uniformed cops, screeching tyres and blaring sirens. We were in the middle of the manhunt.
As they scoured the streets at speed, we walked by some of the Algerian men I’d seen in the cafe.
Image: Kaddour-Cherif walked up to a nearby police van as Tom continued to question him
One man near the group was wearing green tracksuit bottoms, a beanie hat and had glasses on.
“It’s him, it’s him,” one of the other men said to me, gesturing towards him.
The man in the beanie then quickly turned on his heel and walked off.
“It’s him, it’s him,” another guy agreed.
The suspect was walking off while the police were still searching the nearby streets.
Josh and I caught up with him and I asked directly: “Are you Brahim?”
You may have watched the exchange in the Sky News video – he was in denial, evasive and pretended the suspect had pedalled off on a Lime bike.
I can only guess he knew the game was up, but for whatever reason, he was keeping up the lie.
Image: Police moved in to handcuff him and used their phones to check an image of the wanted man from one of Sky News’ online platforms
Image: Once his identity was confirmed, Kaddour-Cherif was put into the back of the police van
Moments later, one of the bystanders told me “it is him” – with added urgency.
Only the prisoner knows why he then walked up to the nearby police van – officers quickly moved to handcuff him and tell him why he was being arrested.
Over the next 10 minutes, he became agitated. His story changed as I repeatedly asked if he had been the man inside HMP Wandsworth.
Officers needed confirmation too – one quickly pulled out a smartphone and checked an image of the wanted man from one of Sky News’ online platforms.
Nadjib had been on the lookout for the convicted sex offender, who had been spending time in different parts of north London since his release from HMP Wandsworth.
He even had a folded-up newspaper clipping in his pocket so that he could check the picture himself.
He told Sky News he was “very happy when he got arrested”.
“I don’t like the sex offenders,” he said.
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“I know him from the community. He has been around here every night since he was released from prison.”
Image: Nadjib (L) told Sky’s Tom Parmenter he had been looking out for the offender
Not only did he tip the police off about the prisoner’s whereabouts, but he also witnessed the other high-profile manhunt that ended in the same park last month.
Ethiopian asylum seeker Hadush Kebatu was also arrested in Finsbury Park after a 48-hour manhunt in the capital. He was then deported to Ethiopia.
Image: Brahim Kaddour-Cherif
“When he [Kebatu] got arrested in the park I was there,” Nadjib said.
I asked him why both men ended up in the same park in north London.
“Because the community, he came here for the community of Algerians,” he said.
Several Algerian people that I spoke to on Friday told me how shameful they thought it was that this sex offender was still on the run.
An NHS trust and a ward manager will be sentenced next week for health and safety failings – more than a decade after a young woman died in a secure mental health hospital.
Warning: This article contains references to suicide.
The decisions were reached after the joint-longest jury deliberation in English legal history.
Alice was 22 years old when she took her own life at London’s Goodmayes Hospital in July 2015.
Her parents sat through seven months of difficult and graphic evidence – and told Sky News the experience retraumatised them.
Image: Mother Jane Figueiredo
Jane Figueiredo said: “It’s very distressing, because you know that she’s been failed at every point all the way along, and you’re also reliving the suffering that she went through.
“It’s adding trauma on top of the wound that you’ve already got, the worst wound you can imagine, of losing your child.”
Image: Step-father Max Figueiredo
Alice’s stepfather Max said he remains “appalled” that she died in a place they thought would care for her.
“The fact we have these repeated deaths of very young people in secure mental health units shocks me to the core. How can society look at that event and portray it as something that happens as a matter of course?”
Ms Figueiredo said Alice had predicted her own death.
“She said to us – out of fear really: ‘The only way I’m going to leave this ward is in a body bag.’
Image: Alice had predicted her own death, her mother says
In a statement, the North East London NHS Foundation Trust said: “We are deeply sorry for Alice’s death, and we extend our heartfelt condolences to her family and loved ones.
“We have taken significant steps to continually improve the physical and social environment, deliberately designed to support recovery, safety, wellbeing, and assist our workforce in delivering compassionate care.”
For Alice’s family, the convictions have brought some justice, but they will never have complete closure.
“As a mum your bereavement doesn’t ever end, it changes over years as you go on, but it’s unending. The thought I won’t even hear her voice is unbearable and I still miss it. I still miss her voice,” Ms Figueiredo said.
Anyone feeling emotionally distressed or suicidal can call Samaritans for help on 116 123 or email jo@samaritans.org in the UK. In the US, call the Samaritans branch in your area or 1 (800) 273-TALK.