On Wednesday morning, the police were alerted to Lerum about a woman who died in an apartment.
A 65-year-old man was then taken for questioning.
A technical examination of the site was carried out with the help of forensic doctors.
- After that, the decision was made to initiate a preliminary investigation into murder or manslaughter, says police spokesman Hans-Jörgen Ostler.
The 65-year-old man who was found in the apartment has now been arrested by prosecutors, suspected of murder or manslaughter.
The woman's relatives have been notified.
- The police have a number of measures that will need to be implemented within the framework of the investigation, such as determining how the woman was brought to life, conducting technical investigations and talking to more witnesses, says Hans-Jörgen Ostler.