There are no reports of anyone being injured in connection with the explosion.
"There is relatively limited damage to the property. From what I can see, it's a broken basement window," says Jakob Palmgren at the police command center.
The National Bomb Squad was on site this morning to assess what caused the explosion.
"We haven't received any reports yet. Technicians will also come to the scene now," says Palmgren.
The explosion occurred at around 8 a.m. on Tuesday and is being classified as a public nuisance. Police have blocked off a road and are interviewing witnesses. No one has been arrested.
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