On Wednesday evening, the Air travel of Western Denmark was interrupted when unidentified drones led to the closure of two of the busiest regional airports in the country, Billund and Aalborg. Flights were diverted or cancelled, and others were rerouted to Copenhagen, and hundreds of passengers were left stranded. Thursday morning, the authorities reopened the airports once the airspace was cleared though they admitted that this was the second drone-related interference in a period of one week.
The incident was described by the officials as a serious one, and an investigation was launched to trace the origin of the incursions. Denmark has been expanding its air security in recent months, and the episode is an addition to increasing the issue of using drones to sabotage or spy illegally around sensitive targets, such as transportation and energy infrastructure, across Europe.
