The alarm came to the police at 02.51 the night towards Wednesday. A resident of an apartment on Lidingö woke up with a bang and discovered that someone threw something in the window that burst, the police write on their website.
The claimant is physically unharmed, but there is less damage in the space in question.
National bomb protection personnel have been on site to check if there is anything left that has not burst.
The apartment is closed off and a technical examination will be done during the day. A preliminary investigation has been launched into the danger of destruction.