Denmark is considering activating NATO article 4 after the country was forced to close Aalborg Airport after Drones were seen for the second time this week.
Denmark reached NATO and the European Union after the threat, According to Euronews.
Allegedly, Copenhagen was considering whether he would call for NATO’s Article 4, who would activate a meeting for members of the Alliance. Neither NATO nor Secretary General Mark Rutte have made public statements about this.
The Danish vice -prime minister and Minister of Defense Troels Lund Poulsen promised in a joint statement that Denmark would “find the people behind it,” said Euronews.
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People walk on 25 September 2025 at Aalborg Airport in Denmark. (Ritzau Scanpix/Bo Amstrup/Via Reuters)
“We have several military capacities that can help to defend Denmark, F-35 and our frigates,” he said.
Smaller airports in the country are said to have also seen drone activities, but were not influenced by this, The BBC reported.
Danish authorities said the drone incident was a “hybrid attack” that, according to the BBC, came from a “professional actor”. The outlet said that the authorities specified that the drones were launched locally and did not come from Russia.
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A light moves in the air above Aalborg, Denmark, on 24 September 2025, amidst reports of Drone observations that led to the airport of the city being closed. (Morten Skov/@Mschieller69609/Via Reuters)
On Monday, a similar drone incident had an impact on Copenhagen airport. In contrast to the incident in Aalborg, some probably had that Russia could have been the perpetrator behind the attack.
Danish Prime Minister Mette Frederiksen said that “the most serious attack on the Danish critical infrastructure was so far,” according to reports. She added that the country “do not exclude any options with regard to who is behind it”, Reuters reported.

Danish police officers are a guard after the traffic had stopped at Copenhagen airport due to drone reports on September 22, 2025. (Ritzau Scanpix/Steven Beautiful via Reuters)
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“The drones that stopped flights at Copenhagen airport were part of a pattern of persistent dispute on our borders,” said the President of the European Commission Ursula von der Leyen on Tuesday, Euronews reported.
The airport in Oslo, Norway, was also closed for three hours on Monday evening due to possible threats of drone activities, according to Euronews.


