No one was injured and no one was at home in the residence at the time of the detonation, which occurred just before 2 am.
A door and window were damaged on the house where the explosion occurred.
By 1 pm on Christmas Day, no suspect had been arrested and the police did not want to comment on any possible motive behind the incident.
I cannot answer whether there are any links to gang criminality, it is naturally a hypothesis, but what we have come up with I cannot disclose, says police spokesperson Ola Österling.
The national bomb squad has examined the crime scene alongside forensic technicians. The police have begun mapping the residents of the house and are conducting parallel intelligence gathering.
We are very interested in getting information about a dark-clad man who traveled on an electric scooter in Brunnsäng, says Ola Österling.
The incident is classified as general reckless destruction.
