A schoolgirl was lured to a residential street and subjected to a “gruesome” attack by a mob of teenagers who filmed her ordeal and posted in on social media.

The victim was led to a road in Weoley Castle where her assailants ripped out her hair and rained down blows even after she had fallen to the floor.

Her T-shirt was soaked with blood after the assault, which attracted around a million views on social media after first being posted on Snapchat.

Sentencing the last two of four attackers, District Judge David Robinson said the 15-year-old was treated like a “rag doll” during a “vicious and sustained” assault.

The youngest defendant, a boy, was aged just 11 at the time of the attack, which took place after school on Wednesday, April 25 this year.

Travelling on buses with a mutual friend of the group, the teenager grew uneasy and asked “am I being set up?” before she was led into the street.

The victim was left covered in blood. Picture posed by model.

The four attackers, also including a 13-year-old boy and girls aged 15 and 16, pleaded guilty to assault occasioning actual bodily harm at Birmingham Youth Court on July 25.

Shiva Misra, prosecuting at the first of two hearings, said the victim was set upon by the youngest girl after being led into the street where other teenagers had gathered.

Mr Misra said the victim “could feel her hair being pulled too hard”. He told the court: “Chunks of her hair were coming out of her head. Essentially, she managed to stay on her feet.”

The older girl joined in as the victim was pulled to the floor by her hair, where she tried to cover her face as she was repeatedly kicked and punched by the pair.

In footage filmed by the 13-year-old boy and posted online a crowd could be heard laughing with a voice shouting “yeah” before the victim fell to the floor.

The victim tried to gather her belongings during a pause in the assault, but the younger girl again grabbed her hair before kicking her repeatedly in the face after she fell to the floor.

The older boy, who was filming the attack from three or four foot away, also kicked the victim in the face and stamped on her while she was on the ground.

The then-11-year-old then joined the beating as the group kicked and stamped on the victim.

Mr Misra said: “Certainly from the Crown's perspective it's remarkable when one views the footage that the injuries were not much more grave than those disclosed.”

A couple who lived in the street tended to the girl in their home before she made her way to her boyfriend's house, where his mother called the police.

She was left with a shoeprint on her forehead and her injuries included cuts, bruises, swelling and a 3cm graze on the left side of her nose.

She was also left with a 1cm cut on her right cheek and had suffered headaches since the incident.

The now 12-year-old's appalled mother took him to the police station after he was arrested, where he fully admitted what had happened.

The older boy also made full admissions about the attack and was tearful and ashamed of his actions when he spoke to officers.

The youths, both from Birmingham, expressed remorse over the incident as they appeared at the hearing.

They received six-month referral orders and were each ordered to pay a £100 victim surcharge.

The two girls, also from the Birmingham area, sobbed as they were sentenced at a later hearing on Tuesday July 17 at the same court.

The 15-year-old was given an eight-month detention and training order, which includes four months in youth custody.

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The teenager, who has previous convictions for assault and possessing a bladed weapon, was also given a restraining order and told to pay a £30 surcharge.

The girl and her mother both wept uncontrollably as she became the last of the four to be sentenced.

The older girl was given a 12-month referral order with an intensive contract, a restraining order and was ordered to pay £200 compensation.

District Judge David Robinson said: “I'm sentencing you both for your part in what was a vicious and sustained attack by a group on a teenage girl. She was lured to where she was assaulted and I have seen the recorded footage of the assault.

"You treated her like a rag doll, repeatedly punching and kicking her head, face and body.”

The girls wept and wiped away tears throughout both hearings, where they were accompanied by their mothers on each occasion.

Stephen Daly, representing the older girl, said: “My client is aged 16 and has no previous convictions.

"I represented her at the police station where she not only immediately admitted the offence but she expressed remorse.”

Mr Daly told the court his client had no previous convictions and did not take part in the second phase of the attack.

She said: “She also denies being involved in any way in distributing footage or images on social media.

"More importantly sir, she saw the incident the following day on social media and she sent an Instagram message to the complainant saying, 'I'm sorry about what happened, it was not meant to be like that'.

"Genuine remorse after the offence and genuine remorse at the police station.”

Basharat Hussain, for the 15-year-old, said his client also felt remorse and her actions stemmed from a traumatic family upheaval which involved her moving from another country to the West Midlands.

The sentencing also heard further details about the case.

Miss Hallam also read evidence from the victim's statement describing how she was kicked while lying on the ground.

The girl said: “I immediately started to bleed and there was a lot of blood. I had a blue top on and blue jeans. They had completely turned red. There were a lot people around."

The girl also described how she had tried to protect herself after being dragged to the ground.

Miss Hallam told the court how the footage of the assault, which had been posted on social media, also led to the 13-year-old's mother taking her son to the police.

Miss Hallam said: “The footage was subsequently circulated on Snapchat and, by lunchtime the following day, there were in excess of 330,000 views of the footage and it attracted the attention of the local media.

"She was shown the footage, she recognised her son and subsequently took her son to the police station in relation to the incident.”

The video of the so-called ‘bully attack’ was so widely viewed that police asked the public not to share it as they investigated the incident.

News of the attack prompted local people to rally round and raise more than £200 to for the victim plus vouchers for pub meals and hair and beauty treatments.