A person who heard the bang found the injured person in an apartment in a two-storey house and alerted SOS.
The injured person was taken by ambulance to hospital, but is said to have been awake and talkative.
Several windows have broken during the suspected detonation and the police are now investigating whether something has been thrown in through a window or if something has detonated on the outside of the house.
In connection with the incident, two apartments have been evacuated and the area around the home has been cordoned off.
- We inventory any film material that may be in the area and hear any witnesses, says Carina Skagerlind, press spokesperson at the police region Stockholm.
The police have launched a preliminary investigation into public destruction.
The text is updated.