The incident occurred in the Ronna district at around 11 p.m. According to the police, a door was damaged, among other things.
Something exploded outdoors and caused a small fire in a bush on a residential property, Andreas Blomquist from the rescue service told LT.
No one has been injured.
The police are investigating the incident as public destruction and a serious violation of the Flammable and Explosives Act. No one had been arrested as of 4 a.m.
Several explosions have occurred in Södertälje in the past month, including at a facade in the city's central parts last Sunday.
