Just before 01:00 on Wednesday, SOS Alarm was alerted to an explosion in the central part of the city.
– They have blown up an entrance door and as far as I know it is the only one that has been injured, says Johan Ljung, officer on duty at the police in the West region, to SVT Nyheter.
He believes that a small fire broke out in connection with the explosion, but it was extinguished when the police arrived.
– We are on site with technicians and national bomb protection. They also knock on doors to see if anyone has seen or heard anything else, says Ljung.
There are no suspects at this time.