We received an alert about a loud bang at 4 p.m., and our staff on site can confirm that there has been some kind of explosion, says Mattias Sköld, duty officer at the rescue service.
There is reportedly a lot of broken glass in the street, but no one has been injured, according to the fire department.
It is possible that some object remains, so we have called in the national bomb disposal unit, which is on its way, as well as forensic experts, says police spokesman Jakob Palmgren.
He urges nearby residents to stay indoors and away from windows.
