German authorities are investigating reports of unidentified drones potentially spying on critical infrastructure in Schleswig-Holstein.

In Germany, law enforcement authorities detained a 41-year-old Croatian citizen for launching an unmanned aerial vehicle (UAV) near Frankfurt am Main Airport. This was reported by the Bild newspaper on October 4,

Drone sightings overnight at Germany's Munich airport led to the cancellation and diversion of dozens of flights on the eve of a national holiday, leaving nearly 3,000 passengers stranded and leading politicians to promise tough new measures allowing for drones to be shot down.

The drones flew over power plants, a university hospital, military installations, and the official residence of Schleswig-Holstein’s state government.

Munich Airport in Germany briefly delayed the relaunch of flight operations on Saturday morning local time due to drone sightings, after previous UAV sightings earlier halted all traffic at the airport for several hours.