The police were called to an apartment in southern Stockholm on the occasion of an illness, the night before Saturday. One person was found injured and was taken by ambulance to hospital. The person has now died.

"The circumstances surrounding the death mean that we cannot rule out crime," said police spokesman Per Fahlström.

What are the circumstances?

- I can't go into them.

What was the case of illness?

- I'm not commenting anymore right now.

Three people have been arrested and the police have launched a preliminary investigation into murder. The apartment has been blocked off for technical examination.