It is still unclear what detonated in the explosion, which occurred at around 23:30 on Wednesday evening and caused damage to the house's door and in the stairwell.
No one has been injured, only material damage, says Thomas Fuxborg, press spokesperson at the police.
The technicians will investigate the crime scene and we are also conducting door-to-door inquiries in the area.
On Thursday morning, the police announced that one person has been arrested, suspected of gross reckless endangerment and violating the law on flammable and explosive goods.
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