Denmark's Aalborg airport, used for commercial and military flights, was closed due to drones in its airspace, police said early on Thursday. This comes two days after the country's main Copenhagen airport was shut over drone sightings that raised European security concerns.
Danish national police said the drones followed a similar pattern to the ones that had halted flights at Copenhagen airport for four hours a few days earlier. The closure of Aalborg airport also affected Denmark's armed forces because it is used as a military base, police added.
