During the day, a large police operation has been in the area with several patrols and helicopters.
The site is cordoned off for technical inspection.
The arrested man is also in his 30s.
The police are silent about their relationship.
The man was arrested after questioning by prosecutors.
He denies any wrongdoing.
- Further interrogations will be held during the weekend, says Daniel Veivo Pettersson who is the on-call prosecutor.
The police are silent
The police keep to themselves how the murder took place with reference to the secrecy of the preliminary investigation.
- The investigation is newly started and people must be heard.
We take care that details do not leak.
How did you get the alarm?
- We know how we got the alarm, but also keep it to ourselves.
The police have had a reinforced presence in the area during the day, where a mobile police station has been on site for security purposes.