COPENHAGEN: Denmark’s busiest airport was shut for several hours on Monday evening after unidentified drones were spotted in its airspace, forcing dozens of flights to be cancelled and diverted.Copenhagen police said that two or three large drones had been “observed flying in the area” of the airport around 8:30 pm local time. Airport spokeswoman Lise Agerley Kurstein confirmed the sightings and said in a statement, “No aircraft can take off or land at the airport, and as a result, several flights are being diverted to other airports. The police are investigating the matter, and we currently have no timeline for reopening.”As of late Monday night, aviation tracking website Flightradar24 reported more than 50 flight diversions, while airport officials confirmed dozens of cancellations. Operations resumed early Tuesday, but delays were expected throughout the day.Copenhagen police duty officer Anette Ostenfeldt told AFP that “three or four big drones” were still flying over the airport. “They are still flying back and forth, coming and going,” she said, adding that the devices were larger than typical civilian drones. “But they are bigger than what you as a private individual can buy,” she noted.Norway’s NRK broadcaster also reported early Tuesday that Oslo’s main airport had temporarily shut after drone sightings, with several flights diverted there as well.The disruption follows a weekend of wider travel issues across European airports, including a cyberattack that hit check-in systems. Drone sightings have previously caused chaos at major hubs — in 2018, repeated drone activity at Gatwick Airport near London stranded tens of thousands of passengers and disrupted hundreds of flights during the holiday season.