It was staff at the upper secondary school who alerted the police shortly after 1 pm on Friday.
One person has received some kind of stab wounds, says police spokesperson Carina Skagerlind to TT.
It is unclear whether the incident occurred inside or outside the school. According to Carina Skagerlind, there was some kind of fight between two students.
The injured student was conscious when they were taken to hospital by ambulance helicopter. The suspect, who is the same age, has been arrested by the police.
The incident is classified as attempted murder.
Now we will talk to the students who may have seen something and conduct a technical investigation when we find the crime scene, says Skagerlind.
The police state that there is no danger to other students or staff at the school.
