A villa in Hölö, south of Södertälje, was shelled on the night of Wednesday.
The police have an extensive operation at the scene.
– We have blocked off and will carry out a technical investigation. In parallel with this, we are also looking for one or more perpetrators, says Helena Boström Thomas, press spokesperson at the police.
The alarm about the shooting came at 03:45. The villa is said to have been empty at the time and no one was injured.
Are you looking at whether there may be connections to the gang environment?
Yes absolutely, in cases like this one always checks whether there can be a connection between similar events, says Helena Boström Thomas.
The police do not want to give any further comment on whether there is a known threat image against someone at the address in question.
It is something that the investigation can show, it is part of the investigative work to see what could be behind it.