A 12-year-old girl who was beaten unconscious and robbed by a teenage gang on a bus in Mill Hill has spoken out at her disgust that no-one came to her aid.

The girl, who does not want to be identified, was stamped on several times in a racist attack lasting around five minutes while on board a single-deck 303 Metroline bus, on August 11, at 6.30pm.

She was sitting with a friend at the back of the bus when a group of around four girls got on at the Concourse, Grahame Park estate, and asked them if they were English or Jewish. They both replied they were fully English', and one girl in the group asked the victim for money, but she said she didn't have any. She and her friend tried to leave the bus at Mill Hill Broadway but were blocked by the gang who searched their pockets and stole a bracelet.

One girl hit the victim around the face with her phone, slapped her several times, grabbed her hair and pulled her to the floor, where she was kicked and stamped on. She was left with a fractured eye socket, bruising and swelling to her face and chest.

"All I remember is her stamping on my face," she said. "Me and my friend were screaming. Then I blacked out. There were four people on the bus who didn't do anything." After regaining consciousness, the girl and her friend tried to pull the bus doors open to escape.

She said: "The driver heard the attack and didn't open the doors. A boy opened the doors for us and I ran off."

She was helped by a motorist and taken to Barnet Hospital, where she was treated for her injuries and kept overnight. She has not taken a bus since the attack.

She added: "I'm scared I'll see the girl on the bus. Whenever I see a group of people I get scared. I thought it is the normal, human thing to go to help two young girls, as we were screaming. There were people there acting like nothing happened. I can't believe anyone could be like that."

Police are treating the attack on the girl, who is Jewish, as a racially aggravated robbery.

A spokeswoman for Metroline said: "It was a nasty incident. Our policy on handling assault is that drivers are instructed to stop the bus and wait for assistance."

The main suspect is described as a mixed race girl aged 14, 5ft 5in tall, with her hair in a side ponytail, and wearing a white top, jeans, a chain and cross.

Two other girls were of mixed race, aged 15. A black girl, 15, and a fifth attacker, described as a small black male, aged 11, are also sought.

Call police on 020 8733 4595 or Crimestoppers on 0800 555 111.