Denmark's defence ministry says "drones have been observed at several of Danish defence facilities" overnight.

The renewed drone sightings come after there were several drone sightings in the country earlier this week, with some of them temporarily shutting down Danish airports.

Several local media reported that one or more drones were seen near or above the military Karup Air Base, which is Denmark's biggest military base.

The defence ministry refused to confirm the sighting at Karup or elsewhere and said that "for reasons of operational security and the ongoing investigation, the Defence Command Denmark does not wish to elaborate further on drone sightings".

The ministry clarified later to public broadcaster DR that reports of additional drone activity at Skrydstrup Air Base and the

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