It did not become such extensive damage to the residence but it should have been a considerable impact, says the police's press spokesperson Mats Eriksson.
Witnesses state that a masked person has placed an object outside the residence which then has exploded at half past one.
We are looking for the perpetrator but have at present no one arrested, says Mats Eriksson.
It is unclear if anyone was in the residence when it exploded.
People ran out onto the street in night clothes because of the loud impact but I do not know if it was the residents of the house, says Mats Eriksson.
Several police patrols are working in the area and the crime scene has been cordoned off while waiting for a technical investigation. The police have initiated a preliminary investigation into general public endangerment and serious offense against the law on flammable and explosive goods.
Corrected: In an earlier version of the text, the incorrect time for the explosion was stated.
