BERLIN (AP) 鈥� Mysterious drone flights over the airspace of European Union member countries in recent months have alarmed the public and elected officials.
, some of them blamed on Russia, reached an unprecedented scale in September. Some European officials described the incidents as Moscow testing NATO鈥檚 response, which raised questions about how prepared the alliance is against Russia.
On Sept. 10, a swarm of Russian drones flew into Poland’s airspace, forcing NATO aircraft to scramble to intercept them and shoot down some of the devices. It was the since Russia launched its on Ukraine on Feb. 24, 2022.
Days later, NATO jets escorted out of Estonia鈥檚 airspace.
Since then, flyovers have occurred near airports, military installations and critical infrastructure elsewhere on the continent and prompted European defense ministers to agree to develop a along their borders to better detect, track and intercept drones violating Europe鈥檚 airspace.
Russia has been blamed for some of them, but denies that anything was done on purpose or that it played a role. European authorities haven’t released much detail about the drone intrusions, with some not acknowledging the overflights publicly until days later.
Other times, authorities were unable to confirm a report of a sighting. At one point, Danish authorities were flooded with 500 tips of sightings over 24 hours 鈥� some of which turned out to be just stars in the sky.
Countries are scrambling to figure out how to respond, including weighing whether to allow authorities to shoot the drones down.
On Wednesday, dozens of flights were canceled at after drone sightings overnight forced it to close temporarily.
Here’s what we know about some of the recent sightings:
Airport closures across Europe
Germany鈥檚 Munich Airport twice earlier last month due to drone sightings. On Tuesday evening, it was closed for about 45 minutes after a pilot reported a drone sighting. The airport was reopened after security officials could not confirm the sighting.
Last week an evening drone sighting at .
And over the weekend, series of unidentified drone flights were detected where U.S. nuclear weapons are stored.
The operators of the drones in recent days were not identified, but Belgian Defense Minister Theo Francken insisted that 鈥渢his is not the work of amateurs,鈥� without elaborating.
In Denmark, drones flew over Copenhagen Airport on Sept. 22, causing major disruptions to air traffic in and out of Scandinavia’s largest airport.
Danish Prime Minister Mette Frederiksen said that Russian involvement couldn鈥檛 be ruled out, calling it 鈥渢he most serious attack on Danish critical infrastructure to date.鈥�
A report of a drone sighting occurred the same evening at Norway’s Oslo Airport, forcing all traffic to one runway.
Danish military sites targeted
Drones also flew over four smaller Danish airports between Sept. 24 and Sept. 25, including two that serve as military bases. Around the same time, Danish reports said one or more drones were seen near or above the Karup Air Base, Denmark鈥檚 biggest military base.
Danish Defense Minister Troels Lund Poulsen said that a 鈥減rofessional鈥� actor was likely behind the 鈥漵ystematic flights.鈥�
The defense ministry refused to confirm the sighting at Karup or elsewhere.
Critical infrastructure in Germany
In Germany, authorities investigated claims that unidentified may have spied on critical infrastructure in the northern state of Schleswig-Holstein. Multiple drones were spotted on Sept. 25 over a power plant in the state capital of Kiel, as well as near a university hospital and a shipyard in the port city, according to a Der Spiegel report.
Regional Interior Minister Sabine S眉tterlin-Waack told a committee of the state parliament that flying objects of 鈥渧arious types and sizes鈥� had been spotted. Chief Public Prosecutor Stephanie Gropp said an investigation was underway.
Der Spiegel said that two had been seen over the Kiel factory premises of TKMS, a maritime defense technologies provider.
Later, a 鈥渃ombined drone formation鈥� was observed over the university hospital and a power plant, and other drone sightings were reported over governmental buildings and the Heide oil refinery in the area, the report said.
Further suspicious drones were spotted over a military base in Sanitz, in the Mecklenburg-Western Pomerania state to the east, the weekly reported.
Russian military planes in Baltic airspace
Last month, in separate incidents. The Lithuanian president called the incursions a blatant breach of the territorial integrity of his EU and NATO-member country.
The Lithuanian armed forces believe that in one of the incidents, the military planes might have been conducting refueling exercises in the neighboring .
Two Spanish fighter jets, which had been doing NATO air policing missions, were scrambled and flew out to the area. Russia鈥檚 Defense Ministry rejected the Lithuanian claim that Russian fighter jets had intruded into its airspace.
In September, to protest after three Russian fighter aircraft entered its airspace without permission and stayed there for 12 minutes.
Baltic nations already have been on heightened alert over neighboring .
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