One person has been arrested.
A police operation is underway and an area has been cordoned off.
The barrier is at a villa, Expressen reports.
The police do not want to go into the specific circumstances, such as how the arrest took place.
An ambulance has also been at a nearby bus stop.
- It belongs together, but we do not really know now how the course of events took place.
That is what we are trying to investigate.
But it is only an injured person, says Sara Lundh.
The alarm about the incident came at 18.10 on Saturday.