Witnesses have described chaotic scenes as up to 80 teenagers spilled in the street during a night of violence that saw one boy knifed to death and two others stabbed.

Emergency services descended on Hertford Road in Enfield on Saturday evening after reports of a mass brawl.

An 18-year-old boy was found by lying in the street with stab wounds by police at around 10.30pm. He died in hospital around an hour later from his injuries.

Two other teenage boys, aged 19 and 17, were found nearby with knife wounds in Palmers Lane. They were taken to hospital for treatment but their condition was not being treated as life-threatening.

One resident told the Standard how trouble flared before between 40 and 80 teenagers spread out on to the road following a party at a nearby community centre.

Angela Bailey, 40, said: “I heard the sirens and went outside.

“One police officer said there had been multiple incidents across the borough of Enfield with multiple injuries.

“The next time I went out I heard someone had been killed.”

She said: “Earlier in the night there were an awful lot of youths heading up towards the community centre where a rave, as they called it, was happening.

“There was no sign of any parents being around at all.”

Ms Bailey said the partygoers were all quite young, aged from around 13 to 20, and there were huge amounts of them.

She said large crowds of teens spilled back into the road as ambulances and police arrived following reports of the stabbing.

“I saw one of the injured boys get put into the ambulance,” she said.

“He was on a stretcher wrapped in foil blankets.”

Ms Bailey, who is now in talks to start a youth club in the area, claimed many of the children had arrived from outside Enfield and caused trouble at the centre.

She said: "The youths that were walking past afterwards looked a bit shocked, like ‘what have we got involved with?’

“One little girl, you could see she was quite distressed by the incident.”

In a video published online, resident Faron Paul confronted some of the teenagers, demanding to know why they had been allowed out so late.

One teen told him: “I was in a rave and then youths kicked off, innit.”

The murder was the second in the capital on Saturday, after a man was stabbed and shot in Bow during the afternoon.

It came a day after the Standard launched an investigation into the capital's knife crime epidemic, with 11 Londoners killed in just 16 days.

Roads in the area remained cordoned off on Sunday as detectives and forensics officers continued their investigations.

A Scotland yard spokesman said: “Police were called shortly after 10.30pm on Saturday, 13 May, to a fight involving a number of people in Hertford Road, Enfield.

“Officers attended and found an 18-year-old man, suffering from stab injuries.

“A 19-year-old man and a 17-year-old male were found nearby in Palmers Lane, also suffering from stab injuries.”

Any witnesses, or anyone with information that may assist the investigation, should contact police via 101 or Tweet @MetCC. Alternatively, call Crimestoppers on 0800 555 111.