Drones have disrupted activity at the second Danish airport in a week, after Aalborg airport in the north of the country was temporarily closed when drones were seen in its airspace.
Three other smaller airports in the southern region – Esbjerg, Sønderborg and Skrydstrup – also reported drone activity, but were not closed.
The incidents come after Copenhagen airport was forced to close earlier this week due to a drone incursion, which the prime minister described as “the most severe attack on Danish infrastructure so far”.
Europe has been on high alert after several Nato member states reported Russian incursions in their airspaces.
“It says something about the times we live in and what we as a society must be prepared to deal with,” Prime Minister Mette Frederiksen told reporters earlier this week.
Russian involvement in the Copenhagen drone incursion could not be ruled out, she added – although Kremlin spokesman Dmitry Peskov called the allegations “unfounded”.
Last week, Estonia and Poland requested a consultation with other Nato members, after Russia was accused of violating their airspace in separate incidents. Romania, another Nato member, also said Russian drones had breached its airspace.
Russia denied violating Estonia’s airspace, while it insisted the Polish incursion was not deliberate. It did not comment on the Romania incident.
The drone activity at Aalborg airport led to at least three flights being diverted away, with officials saying the Danish Armed Forces were affected as the airport is also used as a military base.
North Jutland Police said they were monitoring the situation at Aalborg closely but could not elaborate on how many drones were involved.
“We cannot yet comment on the purpose of the drones flying in the area, nor can we say anything about who the actor behind it is,” chief inspector Jesper Bøjgaard Madsen said.
“If we get the opportunity, we will take down the drones,” he added.
Police said they did not believe there was any danger to passengers at the airport or residents, but asked the public to keep their distance from the area. Of the three flights affected at Aalborg, two were sent back to Copenhagen, and another back to the town of Karup.
In southern Denmark, South Jutland police received several reports of drone activity at airports in Esbjerg, Sønderborg and Skrydstrup. Drones were also seen flying over northern Esbjerg.
Addressing the drone reports in Esbjerg, Sønderborg and Skrydstrup, police said they were “taking the situation seriously”, but could not comment on a motive, adding they couldn’t rule out the activity being a prank.
They added that none of the airports had been closed and there was no danger to the public.
Following a meeting on Tuesday, Nato issued a statement condemning Russia’s actions and warned that it would use “all necessary military and non-military tools” to defend itself.
“Russia bears full responsibility for these actions, which are escalatory, risk miscalculation and endanger lives. They must stop,” it said.
Nato’s secretary general Mark Rutte said: “We are a defensive alliance, yes, but we are not naive, so we see what is happening.”
After his speech to the UN, Donald Trump suggested that Nato nations should shoot down Russian planes breaching their airspace.
Estonia requested the consultation with other Nato members after Russian warplanes violated its airspace last Friday.
Three Russian MiG-31 fighter jets entered the Estonian skies “without permission and remained there for a total of 12 minutes” over the Gulf of Finland, the government said.
Italy, Finland and Sweden scrambled jets under Nato’s mission to bolster its eastern flank.
Earlier this month Poland said it shot down at least three Russian drones which had entered its airspace. Days later, Romania tracked a Russian drone in its airspace near Ukraine’s southern border.
