The alarm came at 03:38.
The emergency services did not have to engage in any extinguishing work.
- There has been no fire, says Hans Eriksson, line operator at Greater Stockholm's fire service.
- Something has slammed against an entrance door, but it is still unclear what.
We are on site and support the police with what they need help with and are waiting for more information about what has happened, says Hans Eriksson to TT.
The police have cordoned off an area around a residential building.
This is the ninth explosion to hit Stockholm this year.
Police and rescue services are on site in Akalla.
Photo: Janne Åkesson/SWEPIX
The article is updated