Outside the school, barrier tapes have been set up and shots are heard inside the room.
The police, who are now going in and practicing, have been told that this is an ongoing shooting.
At least one perpetrator with a gun is moving inside the room.
- We are very happy that we can be here.
It is important to practice in the environment where it can happen, says Peter Björk, acting group manager at the education section in Region East.
In the clip, Peter tells more about why the exercise is done.
Unusual rehearsal space
They rarely practice in a real school environment, most often the training takes place in built-up environments, says Peter Björk.
- I would say that this collaboration is quite unique.
I know that it has been implemented in the South region before, but it does not happen often.
Similar police exercises will also be arranged at Bäckadalsgymnasiet, Per Brahegymnasiet and Erik Dahlbergsgymnasiet in Jönköping this autumn.
- A lot is about the mental preparation, to prepare for what can happen, says Peter Björk.
He is supported by Eva-Karin Karlsson, security strategist in Jönköping municipality.
- We have seen a demand from the staff, that you have questions and thoughts about how to handle an attack in school.
This gives us the opportunity to learn and increase security in this issue, she says.
No students present
Eva-Karin Karlsson, security strategist Jönköping and high school principal PO Johansson welcome the exercise in the school premises.
Photo: SVT / Linda Mathillas
Right now, no students are involved in the education and one explanation is that it can be frightening, according to Eva-Karin Karlsson.
However, she does not rule out that high school students will be able to participate later.
"Armed violence at school sounds awful"
High school principal PO Johansson at Bäckadalsgymnaset is positive about this initiative.
He says it is important to practice this type of event to be as prepared as possible.
- Armed violence at school sounds awful and arouses a lot of thoughts and feelings, but unfortunately it is a reality both in Sweden and other countries today, he says.