Four people were in the apartment when police and an ambulance arrived.

"It seems to have been some kind of party," says Stefan Gustafsson, the police spokesperson.

A man sustained injuries to his arm, probably knife injuries, police say. He was taken to hospital, but did not have life-threatening injuries.

Suspected of attempted murder

It turned out that one of the four people on the scene, a woman, may be the one who has cut the man and the woman was arrested by police. The woman is now suspected of attempted murder, or grossly abusive.

- It can go down to serious abuse, it's this woman who has to respond to the intention. But when you put a knife in someone you get to know what you do. It can get really serious, says Stefan Gustafsson, the police spokesperson.

The apartment has been closed off for technical examination and the woman has been taken to the police station for questioning.