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Yet more footage has emerged of rampaging youths causing violence at the Wireless music festival.

In the latest clip, a mob of ticketless youths trampled security fences as a woman was treated for an apparent stabbing yards away.

Dramatic footage shows the group trampling over metal fencing as security guards scramble to keep them out of the festival in Finsbury Park on Sunday.

A video of the incident later shows a woman with a bloodied leg receiving treatment nearby as another youth manages to climb over the fence and into the event.

Witnesses said the woman had been stabbed as violence erupted for the third time in three days at the north London park where the festival was being held.

One told the Standard she was trapped as people lay bleeding from injuries they suffered in the crush.

The woman, who asked to be named only as Alex, said she was trying to enter the site with a ticket when "a stampede starting charging for the main entrance gates".

"People were screaming and being trampled on," the 27-year-old said. "I saw people bleeding after being injured from the riots. Gates were being used as weapons at one point."

She went on: "People then started to push open all the entrance gates as security watched and more people started to stampede behind us so we slipped through by the side to where the main riot was happening. I could hear people saying someone got stabbed.

"I could see people bleeding being taken for medical care by the entrance gates once we got in. It was scary and not what I was expecting from a festival run by the biggest promoter in the world."

Arya Mosallah, 15, who captured the chaotic scenes on video and posted it to his YouTube channel, said: "All the people you can see in the video didn't have tickets so they all gathered round and rushed through the gate.

"It was really loud from the concert and all the people shouting. They were all having a go at the security. People that paid to get into the concert couldn't go in - it was kind of unfair.

"It was really tense," he added.

The festival featured performances from the likes of Jessie J and Rita Ora, but was plagued by repeated attempts from ticketless fans trying to breach security.

Hundreds tried to break into the site on Saturday, with separate video footage showing a fearless lone police officer holding off a crowd of would-be gatecrashers at the gates.

In another incident at the festival gatecrashers were seen storming through security fencing during a performance by rapper Lethal Bizzle on Friday.

The Metropolitan Police said it would not be taking action over the specific issue of crowd trouble. Eight people were arrested at the festival on Friday and Saturday for offences including knife possession and ABH.

A Wireless Festival spokesman said: “There were a small number of incidents that were dealt with quickly where no-one was hurt, on an otherwise hugely successful Wireless weekend.

"Organisers of Wireless Festival take security very seriously and work closely with ShowSec Security, Local Police and other agencies to put procedures in place to ensure the event maintains an enjoyable and secure environment for all its customers."