DENMARK – Copenhagen International Airport was on Monday closed to air traffic after drone sightings.

“The airspace above Copenhagen Airport has been closed since 8:30 p.m. due to the presence of two or three unidentified drones. No aircraft can take off or land at the airport,” airport spokesperson Lise Agerley Kurstein said.

“Two to three large drones have been spotted flying in the area,” the police said, adding that an investigation was ongoing.

Flight tracking service Flightradar24 said on X that as of 2205 local time, more than 35 flights bound for Copenhagen had been diverted to Billund and Aarhus airports in Denmark, as well as Malmo and Gothenburg airports in Sweden, due to the drone threat.

Media reports said a large police presence was seen at the airport, while passengers were waiting inside the terminal.

Copenhagen Airport is the largest airport in Denmark.

Capable Actor Behind the Drones

On Tuesday, the Danish police said that while they don’t know who was responsible for the drones, they believed it to be a “capable actor.”

“The number, size, flight patterns, time over the airport. All this together..… indicates that it is a capable actor. Which capable actor, I do not know,” said inspector Jens Jespersen.

The airport was later opened on Tuesday after having been closed for several hours, resuming normal operations. The drones flew away on their own.

“The drones have disappeared and the airport is open again,” Deputy Police Inspector Jakob Hansen told reporters. “We didn’t take the drones down,” he added.

Hansen said that the police was working together with the Danish military and intelligence to know where the drones came from and who was operating them.

Oslo Airport Drone Sightings

A similar drone incident was also reported in Norway at Oslo Airport on Monday.

“We have made two separate drone sightings,” Monica Fasting, a spokeswoman for Oslo Airport, confirmed Tuesday morning, adding that the airport reopened at 3.15 am local time.

The closures forced several flights to be diverted, while departing services faced long delays and cancellations.

Both airports warned that disruptions would continue through Tuesday as traffic gradually returned to normal.