At 23.40 on Monday evening, police and emergency services were alerted about an explosion at a residential building in Bro.

- At least one person was in the villa but we have no information that anyone was injured. There is damage to the property, including broken windows, says Ola Österling, press spokesman at the Stockholm Police.

Unclear what detonated

The area around the villa was blocked off to be investigated by the police's bomb and forensics. By three o'clock at night, the work was done.

- The place is now classified as safe. I cannot answer what has been detonated, the analysis samples will answer, Ola Österling owns.

The incident is classified as dangerous destruction, and a large number of people who heard the explosion are being questioned by police, according to Österling. No one is arrested for the crime.