Denmark's second-biggest airport, Billund, was briefly shut early on Friday following a report of illegal drone activity that police later identified as "a shining star in the sky," amid heightened concern over drone sightings nationwide.

Drones flew over four Danish airports overnight Wednesday into Thursday, the latest instance of unexplained drone activity that has raised concerns about security in northern Europe amid growing Russian aggression.

The opposition has accused the government, led by Social Democrat Mette Frederiksen, of failing to anticipate security threats. Frederiksen, meanwhile, has warned against fueling controversy, reminding the public that the aim of these attacks is to sow division.

Several European Union leaders are participating in talks Friday afternoon to discuss a potential "drone wall" to prevent drone attacks from Russia or others.

STOCKHOLM: Denmark said on Friday (Sep 26) it had accepted Sweden’s offer of anti-drone technology for next week’s European Union summit in Copenhagen, after a spate of mysteriou

Authorities reported multiple drone sightings overnight on Sept. 26 in northern Germany, which they suspect may be linked to espionage, according to German broadcaster NDR.

Denmark has no plans to invoke NATO's Article 4 clause on security consultations, its foreign minister said on Friday, after drone incursions shut down air traffic in various parts of the country several times this week.

Amid rising Russian aerial incursions in Europe, drone sightings near a Swedish naval base have set off alarm bells. Drones have led to prolonged shutdowns of airports in Denmark and Norway this week.