The principal about the teacher's contribution to the knife attack: "His focus was to get the students out" 

The knife attack, in which a teacher and a student were injured, took place on Monday.

Students have told how the perpetrator entered the classroom with some form of mask or mouth guard on him and then attacked the teacher with a knife.

All schools in the school group Academedia regularly practice school attacks and the teacher tells SVT that he did exactly as they had practiced. 

- His focus was to get the students out, says Dalila Adilagic, principal at NTI high school.

Hear more about the event and the principal's story in the clip above.