Three people were stabbed to death and two teenagers disembowelled in just 48 hours in separate attacks across London.

Dramatic video shows police battling to save one of the teenagers' lives after he was attacked with a machete in a brawl over a belt on Thursday.

The teenager, who has not been named, was surrounded by police and paramedics after the vicious street fight involving up to 30 youths.

This is the scene as a boy was left fighting for his life after he was stabbed in the stomach following a knife fight in Camberwell

The day before, former Britain's Got Talent singer Simonne Samantha Kerr was stabbed to death in a Battersea terrace.

Desmond Sylva, 40, faced court on Thursday charged with her murder. The two appeared to be known to each other but the relationship was unclear.

Ms Kerr wowed audiences on ITV after appearing on Britain's Got Talent as part of the NHS choir B Positive, created to raise awareness for blood donations.

Then on Friday morning police arrested a teenage boy and a 35-year-old woman on suspicion of murder after a man was stabbed to death in a Waltham Forest home.

Simonne Kerr (pictured with her six-year-old son Kavele died from complications arising from sickle cell disease in 2015) was stabbed to death yesterday

The 31-year-old wowed audiences on ITV after appearing on Britain's Got Talent as part of the NHS choir B Positive, created to raise awareness for blood donations

Paramedics were called in the early hours of the morning and found the 42-year-old with stab wounds, and he was pronounced dead 42 minutes later.

Later that day a man was stabbed to death near a knife fight in Old Kent Road in which four youths were injured.

The man in his 50s was found dead from multiple stab wounds in a home just a mile away from the vicious gang-related street brawl.

The disembowelled boys were two of four aged 15 or 16 stabbed as gang violence erupted in Camberwell, South London, over a belt at around 5.30pm on Thursday evening.

Footage of the bloody aftermath shows police apparently having to keep rivals apart as they treated stabbing victims on the ground.

A witness said a man holding the machete was screaming 'I want my belt back' at rivals, as residents said the estate is becoming a 'warzone' and more like the Bronx in New York.

Four stabbings, three fatal, in the space of 48 hours around London

Police have arrested a teenage boy and a 35-year-old woman on suspicion of murder after a man was stabbed to death in a home in Waltham Forest, east London

A man was stabbed to death near a knife fight in Old Kent Road in which four youths were injured

The man in his 50s was found dead from multiple stab wounds in a home just a mile away from the vicious gang-related street brawl

Residents of the Elmington Estate described hearing echoing screams of 'help, help' as the two rival groups clashed and heard one youth shout: 'I'm going to f*****g kill you'.

A witness described seeing a boy with their 'intestines falling on the ground' in an attack that may have been launched on bikes.

One teenager is in a critical condition and another is also seriously ill in hospital - the two other victims were knifed in the arm or leg but will survive.

Six young men, all aged 15 and 16, have since been arrested on suspicion of violent disorder and grievous bodily harm and are in custody.

A man, who lives in a flat which overlooks the scene, said: 'One had a big a** hunting knife and he was screaming 'I want my belt back! I want my belt back!'

'The knife was about 16 inches long. I went back in doors because I assumed nobody would get seriously hurt over a stupid belt.'

The teenager, who has not been named, can be seen surrounded by police and paramedics after the vicious street fight which involved up to 30 youths

The boy was one of four aged 15 or 16 stabbed as gang violence erupted in Camberwell, South London, over a belt at around 5.30pm yesterday evening

A huge knife was found at the scene of the stabbing attack on Elmington Estate (pictured)

One local mother, who did not want to be named, said she saw one of the boys carrying a blade more than a foot long.

'I could see the knife in his hand, I could clearly see the blade, it was big and that was worrying me,' she added.

'My little boy is growing up around here, it's terrifying.'

Another witness said she saw 'lots of blood' on the ground and saw a 'massive' knife lying on the floor.

'I did see a massive blade, a carving knife, it was horrifying,' she added and gestured that the weapon was more than a foot long.

Scotland Yard said the victims of the latest incident were between 15 and 16 years old.

Forensics officers photograph the crime scene today where the street is covered in clothes, shoes and medical supplies

Part of the corner of one road appeared to stained with blood left after the fight yesterday

Bikes including a Boris Bike were abandoned after the attack and police will be probing if this was how the knife attack was launched

Another resident, who also did not want to be identified, said she dialled 999 after one of the boys fell to the floor clutching his side.

'I saw a boy holding his side and he just fell on the floor so I called the police,' she added.

'I was really shaken up, you could see the bloody clothes and from window.'

She said the incident happened outside her young daughter's bedroom and added: 'I hate it here, it's getting worse and worse. I'm frightened to go out the front door.

'As frightened as I was, I wasn't going to let someone die in front of me.'

A group of boys were seen running outside Landor House on the Elmington Estate minutes before police arrived at around 5.30pm.

A neighbour said he saw one of them jump from a first floor balcony and added: 'There was a gang of 20 maybe 30 and they were running back and forth.

Camberwell has been the scene of several murders in recent months including several linked to gang violence

'I saw one jump from a balcony and ran across towards the shop area.'

Six boys aged between 15 and 16 are in custody after being arrested on suspicion of violent disorder and grievous bodily harm, Scotland Yard said.

A mother-of-four who lives on the estate said she saw some of the group being arrested.

'I saw police chasing people, four officers had to grab this one boy,' she added. 'He was fighting one (officer) and three others had to get involved.

'I don't let my kids out to play, if I'm not there they're not going out.'

The latest knife attack was minutes from where drill rapper Sidique 'Incognito' Kamara was stabbed to death this month and there have been four murders within a few Camberwell streets since May.

Lorraine Wooller had lived on the estate for 45 years, but moved recently because of the increased violence in Camberwell.

She told LBC: 'I've never seen anything like this in my life. It's getting like The Bronx, it's disgusting.

'There's always gangs around here. It gets worse every day. You're too scared to come out of your house. My sister doesn't like coming out the house any more.'

She added: 'This woman told me she shipped her boy off to France because a couple of weeks ago [she] got a bash at the door. She opened it and said a black man rushed in with a knife and acid after her son'.

A police cordon remains in place near Landon House, Camberwell, which is where the incident took place

Officers are guarding the cordon directly outside the housing estate

Witnesses told MailOnline two of the teenage victims had 'their stomachs cut open' and one was surrounded by a huge crowd of police as he was treated by paramedics.

At least one of the youths, said to have been knifed in the arm, had his wound wrapped with a t-shirt while paramedics rushed to the scene.

Susan Model, 20, who watched the incident unfold from a ground floor flat, said: 'We saw four people, three of them lying on the ground and one of them being walked off.

'He had a bandage wrapped around his arm. It was white and covered the whole of the top of his right arm.

'I heard two got their stomach cut open – there was two stomach, one leg and one arm – because you could hear the conversations that were going on.

'It was manic, it was completely manic, there were a lot of black boys shouting, screaming, you had neighbours worried because we didn't know if we knew them.

'The police said the stomach wound looked life-threatening.'

The scattered remains of first aid equipment can be seen within the boundaries of the cordon

Superintendent Annmarie Cowley said: 'This incident is in its very early stages and at present we cannot speculate on what the nature of it may be.

'What we can say for certain is if there needed to be an example of the utter senselessness of knife crime, then this is it.'

The violence erupted between a gang of around 30 teenagers.

The victims are not thought to live on the estate but neighbours said a garden area concealed from view by the flats has become a hotbed for youths.

A man, who did not give his name, said: 'The lads hang around there all the time, it started at least six months ago.

'Recently there have been more and more.

'They are downstairs at the end of the block doing what boys normally do, shoving each other and messing about, but I don't recognise any of them.'

Another resident added: 'There's drugs, prostitution, it's not a good place to bring up your kids.'

First aid equipment is strewn across the floor near to the crime scene

Police were called to the scene shortly before 5.30pm this evening after reports of a stabbing near to Landor House, on the Elmington Estate

The youngster was one of four stabbed as gang violence erupted on a South London housing estate echoing with screams of 'help, help' yesterday evening.

Witnesses described how the most seriously hurt teenager fell to the floor clutching his stomach.

The scene was littered with bloodied clothing, trainers and medical equipment in the aftermath of the attack.

A 25-year-old woman, who did not want to be named, said: 'That particular one, I hope he does live but by the looks of it and the way the ambulance had to struggle I would give it just an 8 per cent (chance). It was very traumatising.'

Another eyewitnesses revealed that one of the boys cried out for help before they were brutally attacked in broad daylight.

Another neighbour, who did not give her name, described seeing boys running on the grass opposite her flat shortly before the stabbing.

'There were four or five black boys running. All of a sudden I could hear, 'Help, help',' she said.

A heavy police presence is now in place around the crime scene in Camberwell

The incident took place near playing fields near to Landor House in Camberwell. A police cordon has been put in place around the crime scene

'I have walked up and as I did I have seen the police running.

'One of the police officers got a first aid bag and I saw one of the boys lying on the floor.'

The scattered remains of first aid equipment used during frantic effort to save the injured victims was pictured inside the boundaries of the cordon last night.

Images posted on social media show a large police presence and a cordon erected around the crime scene.

Scotland Yard Commissioner Cressida Dick claimed violence in the capital was waning, despite 88 killings so far this year, compared with 118 in 2017.

She insisted there was far more bloodshed in major US cities, even though in February and March London overtook New York's murder rate for the first time.

She said the murder rate had slowed in London – adding that there have been 161 killings in New York this year, almost double that in the capital.