Several people have heard bangs in Ritorp and something has exploded outside a front door to a row house. No person is physically injured.
It is reported to be minor damage to a house facade.
The police have cordoned off the crime scene and are searching for the perpetrator(s), including a dog patrol participating in the search. Witness interrogations are also being conducted on the scene - including through door-to-door questioning.
The National Bomb Protection will investigate what exploded.
A preliminary investigation has been initiated regarding malicious destruction of property and a crime against the law on flammable and explosive goods.