Oslo police and emergency services responded to an explosion in the Pilestredet area at approximately 8:30 PM local time on September 23rd, 2025, with the situation and any potential damage or injuries currently unclear. Operations manager Øyvind Hammervold stated that authorities are working broadly at the site and do not yet have an overview of the incident's impact. The explosion was reported just minutes before the end of the current reporting window, indicating a developing situation. This incident in Oslo follows earlier reports of drone activity disrupting Copenhagen Airport on September 23rd, 2025, which led to flight cancellations and diversions. Danish authorities are investigating potential links between the Copenhagen drone incidents and activities in Norway. Previous reports indicated that Danish police were investigating three vessels, including the Russian cargo ship Astrol 1, the Benin-flagged tanker Pushpa, and the Norwegian cargo ship Oslo Carrier 3, as potentially involved in the Copenhagen drone activity. The Danish Minister of Defence and Prime Minister have described the drone incidents as deeply serious and worrying, with no ruling out of Russian involvement. Investigations are also examining the possibility of a civilian aircraft, OY-CDT, being involved in the Copenhagen airport disruption.