It was early on Tuesday morning that the police were called to an apartment where a person had uttered various threats.
A larger area was cordoned off, including around a school in Gråbo.
– We made the assessment that we started by having the students inside and not having outdoor activities as we normally have, says Johan Lindberg, principal at Gråboskolan.
In the morning, a person could be arrested who is suspected of gross illegal threats. The police are still expected to work on site, and cordons are still in place around the affected apartments.
See and hear more in the video above.