Overview

• An explosion struck central Oslo near a university campus about 500 meters from the Royal Palace and the Israeli embassy on Tuesday evening.
• Officers later carried out a controlled detonation of a second device described as a military‑type hand grenade at about 21:44 local time, and the area was declared secure.
• One person was detained for questioning as investigators continued to seek other possible participants, and no injuries were reported.
• Authorities issued a rare emergency mobile alert to residents as they cleared and secured the scene.
• TV2 and Aftenposten reported the detained individual may be 13 years old, a detail police did not confirm, and the incident followed drone sightings that disrupted flights in Oslo and Copenhagen the previous day.