Key Points:

• Drone flights 'most serious attack' on Danish infrastructure, PM says Airports in Copenhagen and Oslo reopened early on September 23, hours after unidentified drones in their airspace caused dozens of flights to be diverted or cancelled, disrupting thousands of passengers.
• Published - September 23, 2025 11:13 pm IST - Copenhagen AFP READ LATER SEE ALL Remove Passengers stand in a queue to get new tickets at the service point of the Copenhagen Airport in Copenhagen, Denmark, on September 23, 2025 | Photo Credit: AFP Large drones that flew over Copenhage
• Drone flights 'most serious attack' on Danish infrastructure, PM says
• Drone flights 'most serious attack' on Danish infrastructure, PM says