- We have a large police resource in place in Vällingby to try to arrest the perpetrator or perpetrators, says Per Fahlström, the police's press spokesman for SVT Stockholm.

Police, who were alerted shortly after eight on Wednesday night, say the victim is a man aged 25-30. The murder attempt should have occurred in a residential building near the center of Vällingby.

- It is too early to say how seriously injured the person in question is at present, says Per Fahlström. 

No person was deprived of liberty at 21.