At 02:00 the police received several calls about a shooting at a residence in Sävja in Uppsala.
Several shots are said to have entered the home, where two adults were - but no one is said to have been injured.
- This type of crime is always associated with great danger, says police spokesperson Jonas Eronen.
The police have cordoned off the area for a technical investigation and door knocking is in progress.
There are currently no suspects in the crime.
The incident is classified as attempted murder and aggravated weapons offences.