Which Aftonbladet was the first to tell.

- We have found an unknown powder in our regular letter review process, says Johan Molinder, head of the Skänninge institute to SVT News East.

According to the head of the department, seven employees were in the immediate area when the envelope with the powder was opened.

- There is a clean-up process under the auspices of the rescue service, by the employees who were in the immediate area, says Johan Molinder.

He also says that they have well-established routines when this happens.

- We have the situation under control.