This is the moment a mass brawl broke out at London's Garage Nation festival where four people were stabbed in a bloodbath.

Emergency services rushed to the scene in Hainault Country Forest Park on Saturday night where thousands of revellers turned out of the event, headlined by artists Artful Dodger and Heartless Crew.

But it quickly descended into chaos when a violent clash erupted involving knives.

Footage has emerged showing a fight breaking out between a group of people at the Chigwell festival - headlined by artists Artful Dodger and Heartless Crew

Four men were stabbed in front of horrified witnesses with two, aged 22 and 26, needing to be flown to hospital with serious injuries. Two other males were treated at the scene.

Police say a group of suspects were seen running from the VIP area towards the main entrance after the attack at around 7.30pm.

Footage has emerged showing a fight breaking out between a group of people at the Chigwell festival - headlined by artists Artful Dodger and Heartless Crew.

Alarmed revellers fled the seen as a man was elbowed in the face with two thugs throwing punches at another man.

Alarmed revellers fled the seen as a man was elbowed in the face with two thugs throwing punches at another man

Panicked revellers were seen running as a man was elbowed in the face and two thugs swung punches at another man.

Two other men are still in hospital, one of whom has potentially life-changing injuries, and a third man has been discharged.

Witness Mel Dee, who saw the incident unfold, tweeted about her horror.

She said: 'Just saw someone get stabbed right in front of me at garage nation. 'He got cut so deep I could see like the layers of his skin it was so bad.

'I've never seen anything like it. Why do people do this? It was honestly the scariest thing I've ever witnessed.

Detective Constable Samantha Handley of the East Area Command Unit CID said: 'We are working with the festival organisers to identify those involved in this incident.

Four men were stabbed in Hainault Country Forest Park where thousands of revellers were attending the Garage Nation event. Pictured: last year's festival

'I would urge anyone who was at the event, specifically in and around the VIP area at 7:30pm, and who saw this incident or the events either side of this incident to contact police.

'I would also appeal directly to the fourth person who was treated by medics but left prior to police arrival to contact officers - he may have information that could prove vital to progressing this investigation.'

There have been 81 killings in London this year, many of them stabbings, and at one point the capital's murder rate was higher than that of New York.

That figure has surpassed last year when there was a total of 80 fatal stabbings in the capital - the most in almost a decade.

Official figures show that 2017 was the worst year for knife deaths among young people since at least 2002.

Forty-six people aged 25 or under were stabbed to death in London, up by 21 compared with the previous year, according to police figures.

Scotland Yard published figures earlier this month showing that only one in ten knife robberies and fewer than a quarter of violent crimes involving a bladed weapon were solved in London last year.

Britain's knife crime epidemic has also spread to the Home Counties, with stabbings now more likely in Bedfordshire than in Merseyside.

Hertfordshire, Hampshire, Warwickshire, Norfolk and north Wales' rates of knife crime have all increased by more than 100 per cent in the past three years.