The assailants attacked the girl in a corridor at Dammfri School on Friday afternoon, local newspaper Sydsvenskan reports. The group assault was captured by the school’s surveillance cameras, enabling police to quickly identify the perpetrators.
“They jumped on top of each other and the fight ended with them kicking and hitting the girl until she became unconscious, or at least badly dazed,” police spokesman Mats Thimgren told Sydsvenskan.
“Among other things, they jumped on her head while she was on the ground. We’re classifying it as aggravated assault.”
Staff at the school called for an ambulance and the victim was taken to hospital where she was treated for minor injuries.
Police were not immediately able to establish a motive for the attack.
The case is set to be handed over to social services since the attackers were all under 15, the age of criminal responsibility in Sweden.