Possible drone observations reported at Copenhagen Airport Kastrup on Monday night, which led to flight disruptions, may have been a school aircraft, according to Dronemagasinet. Copenhagen Airtaxi confirmed that their school aircraft were conducting training flights in the area during that time. Prime Minister Mette Frederiksen has described the incident as "the most serious impact on Danish critical infrastructure." The nature of the "flight dance" and the extent of any flight delays or cancellations are still under investigation. A Finnair A350 aircraft en route from Helsinki had previously made a U-turn over the Kattegat sea and returned to Helsinki during the period of potential drone activity. The reason for this diversion remains unknown, as confirmed by Flightradar24.