Several unidentified drones shut down airspace over Copenhagen Airport. Monday night's incident prompted concerns that Russia could be behind the flyover above Scandinavia’s largest airport.

All flights in and out of Denmark's Copenhagen Airport were held up for hours after police reported two or three large drones spotted in the vicinity.

Denmark's Aalborg airport, used for commercial and military flights, was closed due to drones in its airspace, police said early on Thursday, two days after the country's main Copenhagen airport was shut over drone sightings that raised European security concerns.

Operations at Copenhagen Airport will resume after flights were suspended for several hours following a drone sighting. Between two to three large drones were seen flying in the area around Copenhagen Airport,

Denmark's Aalborg airport, used for commercial and military flights, was closed due to drones in its airspace, police said early on Thursday, two days after the country's main Copenhagen airport was shut over drone sightings that raised European security concerns.

Copenhagen Airport was closed Monday night after drones were discovered nearby, an airport spokesperson told CNN. Copenhagen Police said in a statement on X that “two to three large drones have been seen flying in the area,

Authorities didn't immediately assign blame Tuesday for the two to three large drones that shut Copenhagen Airport.

A sighting of a suspected drone briefly shuttered a Danish airport on Friday for the second time in a few hours, after the country's prime minister said the flights were part of "hybrid attacks" that may be linked to Russia.

A drone incursion shut down Copenhagen Airport for four hours, raising concerns about airspace security, critical infrastructure protection.

It was not immediately clear who was flying the drones. The airports were closed for several hours, disrupting dozens of flights.

Drones flew over four Danish airports overnight Wednesday into Thursday, the latest instance of unexplained drone activity that has raised concerns about security in northern Europe amid growing Russian aggression.