Oslo police have made four arrests following a hand grenade explosion in Pilestredet on Tuesday evening. The incident, which occurred at approximately 8:15 PM, involved one grenade that detonated and another that failed to explode but was safely handled by authorities. No injuries were reported, though police emphasized the significant damage potential of the explosion.

Two 13-year-old boys were initially taken into custody on Tuesday night, with two additional older teenagers arrested on Wednesday evening. The older suspects are both above the criminal age of responsibility and have been charged with involvement in serious illegal handling of explosives. Police confirm that the two 13-year-olds remain in the care of child protection services and will be interviewed again on Thursday.

Investigators are working under the hypothesis that the explosion is connected to conflicts between criminal actors. Police Inspector Grete Lien Metlid stated that the leading theory suggests the teenagers may have taken on a "violence as a service" assignment, carrying out the attack on behalf of others. The target appears to have been a business premises near the explosion site rather than specific individuals.

The investigation continues to examine potential connections to a separate kidnapping case involving a 24-year-old man last week. Police are exploring whether there might be a motivational link, given that the kidnapping victim reportedly has family ties to the business owner operating from the premises near the explosion site. Authorities have not commented on possible international criminal connections and emphasize that further arrests remain possible as the investigation progresses.

Norwegian authorities are investigating an incident where a man suspected of attempted murder was injured during his arrest on the E18 highway in Sandefjord. The Special Unit for Police Matters has launched a mandatory investigation after the suspect sustained a fracture injury while being apprehended by police officers. Evidence from the scene has been secured as part of the probe into the circumstances surrounding the arrest.

The investigation stems from events that began Saturday evening when a woman was shot at a private address in the Unneberg area north of Sandefjord city center. The suspect fled the scene on an electric scooter following the shooting incident, which occurred around 3 PM. Police established a roadblock on the E18 highway as part of their response to the shooting.

The suspect was apprehended at approximately 7:45 PM at the police roadblock, during which he sustained injuries described as a fracture. While the extent of his injuries remains unclear, the Special Unit has initiated its investigation to clarify the sequence of events and circumstances leading to the injury. Both the suspect and the involved police officers will be interviewed in the coming days as part of the mandatory review process.

The man, who has provided an initial statement to police, has been formally charged with attempted murder and was remanded in custody by the Vestfold District Court on Monday morning. Police indicate the suspect and victim were acquainted but did not have a close relationship. The woman who was shot did not sustain life-threatening injuries, though her exact condition remains unknown as authorities continue their parallel investigations into both the shooting incident and the arrest-related injury.