The police were alerted to the scene at 22.52 after an explosion at Slussen in Malmö.

Damage has been found at the entrance to the property.

- This is a building that the Swedish Prison and Probation Service is housed in and it is not an activity right now, says police spokesman Rickard Lundqvist to the news agency TT.

If there is any threat against the Swedish Prison and Probation Service is not known to the police at present.

The police do not want to leave more comments at the moment.

- It's too early. This is an assessment that specialists must make first and these are the ones we are consulting. We do not know what exploded. Right now, an assessment is being made as to whether the national bomb protection needs to be sent there to make it safe on the spot, says Rickard Lundqvist.