Several shells have been found at the scene, according to the police, but there is no information that anyone has been injured.
We have no one arrested at the moment and we are trying to find out what happened, says Anna Westberg, press spokesperson at the police.
The alarm about the incident came in just after 04.00 during the night towards Tuesday.
People called us that they had heard bangs, says Anna Westberg.
The police have initiated a preliminary investigation into serious weapons offenses. The area is cordoned off for technical investigation.
