CNN

The airspace over Aalborg Airport in Denmark has been closed after drones were spotted flying nearby, airport CEO Niels Hemmingsen told CNN on Wednesday.

This is the second time this week that an airport in Denmark has been forced to close due to drones.

On Monday, sightings of two or three large drones near Copenhagen airport halted all take-offs and landings for nearly four hours.

Police are investigating.

This is a developing story and will be updated.

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