The alarm about the explosion came at 19.15 on Sunday. No people were injured and the building itself has, according to the rescue service, no structural damage.
When we arrived, it turned out that the outer door to this apartment building had been blown off, says Henrik Dewoon-Thorén, officer in charge at the rescue service.
We have had some smoke spreading in the stairwell and in one apartment that we have ventilated.
The police are now searching for those behind the explosion.
We have received some witness statements that are very interesting, says the police's press spokesperson Ola Österling.
He says it's about observations of people and vehicles.
The police are also working on mapping those who live in the house to see if it's possible to find out who was the target.
The area is cordoned off for a technical investigation.
