A boy under 18 years old has been arrested after an explosion in Upplands Väsby on Wednesday, reports P4 Stockholm.
It was on Wednesday evening that an object was thrown into a gate of an apartment building. The object exploded and caused material damage to the gate.
It has also shattered window panes at a couple of nearby residences and car windows on a parked car in the vicinity, said Robert Sennerdal at the police to TT on Wednesday.
The police have initiated a preliminary investigation into attempted murder, general endangerment, and offenses against the law on fire hazardous objects.
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