The man was taken to hospital by ambulance and later died of his injuries.
The alarm was raised at 20.15 on Thursday. The police do not want to comment on how the man was injured, according to reports from several media outlets, it is about a shooting.
How he got his injuries, we have chosen not to disclose at present, says the police's press spokesperson Mats Pettersson to TT.
No suspect has been arrested. The police are looking for one or more perpetrators.
We have cordoned off areas that we have also expanded. We are conducting a crime scene investigation, securing evidence naturally, and we are also talking to people who may have seen things that can be important for the investigation.
A film is spreading on social media that allegedly shows the shooting, but it has not been confirmed whether it is the actual event.
This specific film I cannot comment on, but we are aware that there is film material and it is part of our information gathering, says Mats Pettersson to Aftonbladet.
According to reports to Aftonbladet, the man is linked to a criminal network. As an investigation is ongoing, the police do not want to comment on the reports.