Karsudden is one of Sweden's largest hospitals for forensic psychiatric care.
This is not a hostage drama, but the situation has been perceived as threatening by the staff.
This is what police spokesman Dennis Johansson Strömberg says.
The police have now taken over the management of the situation.
- We have police patrols with special expertise on site who work according to our routines.
Right now we are trying to talk to them to get them to surrender themselves, says Dennis Johansson Strömberg.
Has anyone been injured?
- I do not know that at the moment.
The text is updated.