The police are on site to form an opinion about what happened.
Several police patrols are looking for the perpetrators.
A suspected crime scene has been found and an area in a parking lot next to the school has been cordoned off.
- Several people must be involved in the quarrel.
There are no arrests at the moment, says Angelica Israelsson Silfver, spokesperson for the police.
Police patrol has talked to witnesses and plaintiffs, a guy in his late teens.
Forensic technicians have been ordered to the scene.
The case is initially classified as assault.