The airspace over Denmark's Aalborg Airport has been reopened after a closure for the second night in a row due to suspected drone activity, police say.

"The airspace over Aalborg Airport has been reopened on Friday at 00.35 (8.35am AEST) after having been shut down due to suspicion of drone activity," police said in a post on social media X.

The airspace over Aalborg Airport was closed nearly an hour earlier on Thursday after a suspected drone sighting in the area, police told news agency Ritzau.

On the previous evening, Aalborg airport, used for commercial and military flights, was closed for about three hours due to drones in its airspace, just days after the country's main Copenhagen airport was shut over drone sightings that raised European security concerns.

Denmark reported to N

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