We received this at 01.35, then there are several residents around who have heard a loud bang, says Morten Gunneng, officer in charge at the police.
There is no information that anyone has been injured. The area has been cordoned off and bomb technicians are investigating the site.
In parallel with this, they are knocking on doors and searching with the help of dog patrols. Who or whom the act may have been directed against is currently unknown.
This is something we are looking at, we have no suspect at present, says Morten Gunneng.
The incident is classified as general endangerment and a crime against the law on fire hazardous and explosive goods.