This socking footage shows a 14-year-old girl getting severely beaten by at least five other girls after they lured her to a sleepover.

Naomi Johnson is punched repeatedly in the head, dragged by her hair and stamped on, while struggling to get away.

The vicious bullies later posted the attack on Twitter trying to ridicule their victim even further.

According to her parents Naomi was severely injured and needed $40,000 worth of medical treatment including an MRI scan to look at a lump near her carotid artery, as Mirror reports.

The video has been handed over to Alaska’s police, where the attack took place in July, but none of the girls have been charged.