The police were alerted at 13:30 on Tuesday. Late in the evening, the police completed the technical investigation and the cordons were lifted.
It is not clear what exploded at the property's gate. A preliminary investigation has been initiated for gross general endangerment and gross bodily harm. The injured woman's injuries are not life-threatening.
We are still looking for potential perpetrators. Despite the fact that it has been quite a long time, we will continue to search, says police spokesperson Carina Skagerlind.
The police had a helicopter and drone in the air, both to get a situational picture and to search for perpetrators.
"You're upset"
The rescue service made an initial assessment of the affected building.
They do not see any risk of collapse, but they need to do more investigations to be completely sure, said police spokesperson Daniel Wikdahl earlier on Tuesday.
A resident in the area describes how he heard a bang, saw a helicopter, and went out.
It's uncomfortable. The only thing I know is that the gate has exploded, he says to TT.
Another man was called by his teenage daughter who was at home in the house where the explosion occurred.
I have a hard time describing how I feel. You're upset. She's scared, says the man, who describes a quiet area where mostly older people live.
Säpo raid in the area
The detonation occurred in an apartment building in the same area where Säpo made a raid on a mosque in March this year. In this case, two brothers and two other men are charged with participating in a terrorist organization, accused of swearing allegiance to the terrorist sect IS in Somalia. Three of them are also suspected of preparing for terrorist crimes and gross weapons offenses.
The police emphasize that they are working broadly and do not want to speculate about whether there is a connection between Tuesday's explosion and the spring's raid.
I think you should refrain from that type of speculation, actually. We don't know what it is that has exploded. We want to keep it very open at this point and not conclude anything, says police spokesperson Carina Skagerlind.