The incident has been reported to the police and Katarina Djukic Forsman has in a mailing to parents and guardians advised that you should talk seriously with your children.

- Fortunately, the person was not injured this time, but it could have ended worse, she says.

During the last three weeks, Surahammar municipality has had various incidents both during school hours and leisure time.

The incidents that the municipality writes about to the guardians are about blasting and arson.

At one point, a jacket was set on fire on the roof at Bäckhammarskolan, at another a bag was found at Hammarskolan that was completely equipped with pet bottles, foil, chemicals and lighters.

In the clip

,

school principal Katarina Djukic Forsman emphasizes the

seriousness of the incidents

and warns that they could have far worse consequences than hitherto.