Drones have flown over Aalborg Airport in northern Denmark, as well as three smaller airports in the country, but it is not immediately clear who was behind the incidents, authorities say.

Defence Minister Troels Lund Poulsen said it appeared a "professional actor" was behind the "systematic" flights, without providing additional details during a news conference on Thursday morning (Thursday afternoon AEST).

Authorities said there was no danger to the public.

The goal of the flyovers was to sow fear and division, Danish Minister of Justice Peter Hummelgaard said on Thursday, adding that the country will seek additional ways to neutralise drones including proposing legislation to allow infrastructure owners to shoot them down.

Flights were halted for several hours at Aalborg Airport, wh

See Full Page