A powerful explosion occurred near the Royal Palace in Oslo. Authorities have detained a 13-year-old suspect.

A loud explosion was heard in Oslo, near the Royal Palace, without causing injuries. Witnesses observed an object resembling a grenade, and the police suspect a gang-related settling of scores. One person, a minor, has been arrested, and investigations are ongoing. The area has been secured, and tram traffic has been halted, while the police used helicopters and drones to monitor the incident.