The shocking moment a 15-year-old was bashed by a group of other young girls outside a state fair has been captured on camera.

Valerie Smalls was headed out of the California State Fair in Sacramento on Friday night so she could meet her mom, who was there to pick her up, when a girl she had never met before stopped her and challenged her to a fight, KCRA reports.

When the video starts, the 15-year-old can be seen putting up a fight before she is knocked to the ground. Other girls gathered around can be heard shouting, 'beat her a**'

A few seconds later Smalls is seen being slung to the ground, and then a number of the girls nearby join in on the beating.

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Valerie Smalls (pictured) was attacked as she left the California State Fair on Friday night. The incident was caught on video

They are seen punching down at the 15-year-old and attempting to stomp on her.

The clip, which lasts about one-minute and was posted on social media, ends when the bystander filming it runs away as sirens can be heard in the background.

Speaking about what she remembers from the attack, Valerie told KCRA: 'It was from one to four, and then from four to 10. And I’m on the floor getting stomped out by 10 plus females that I’ve never met.

'My mouth was stomped on, like I couldn’t talk. After everything, I was mumbling for about an hour. I couldn’t even open my jaw.'

The 15-year-old was taken to a nearby hospital and treated before being released. She said she also lost her phone, purse, and wallet during the beating.

Video from the brawl was posted on Instagram on Friday night by a bystander. Smalls is seen in the middle of this still image being punched

The 15-year-old tried to put up a fight against the group, but after a few seconds she was overpowered

Valerie Smalls was thrown to the ground during the brawl and the group then began punching and stomping her in the head

Valerie's mother, Bridgett Smalls, told Fox30 her daughter had knots on the back of her head, neck injuries and a busted lip after the fight.

The 15-year-old told KCRA she does not know why she was singled-out for an attacked by the group, and tried to stress there are better ways to handle disagreements.

'If you feel like you can do things the adult way and fight me, you should do things the adult way and talk to me,' she said.

State Fair spokeswoman Sabrina Rodriguez said there was another incident Friday night that led to two people being kicked out due to a fight.

'That violates our code of conduct,' Rodriguez said, according to KCRA.

'As a result of that, anyone who violates our code of conduct usually gets asked to leave and that's what happened (Friday) night.'

Valerie Smalls posed for pictures with a friend at the fair on Friday night before the attack