The police have asked residents in the area to stay away from the site and have also made a hand grenade harmless in a controlled explosion that was found near the explosion site in the Bislett area in central Oslo.
A first person, a minor boy, could be arrested immediately after the incident. After a raid on an address in Oslo, two more people could be arrested, these are also said to be minors according to Norwegian media.
Our main hypothesis is that this is a criminal settlement against other criminals. We have no reason to believe that this is a randomly chosen place or something like that. As a resident of Oslo, you have no reason to be extra worried now, says rescue manager Brian Skotnes.
There are no reports of injuries in connection with the incident.
