It was late on Sunday evening when the alarm came and when the rescue service arrived at the scene, the row house was burning heavily. A woman and a child who were in the row house were seriously injured, but according to reports, it is not life-threatening.
By Tuesday morning, no one had been arrested for the crime.
We don't know yet what exploded, says Mats Eriksson, press spokesperson for the Stockholm police.
The police have initiated a preliminary investigation into attempted murder, aggravated general destruction, and serious crime involving fire hazardous and explosive materials.
According to reports from the rescue service, a man and a woman with two minor children live in the residence. According to media reports, the target of the attack may be a person at a different address.