Source says Russia ‘very probably’ responsible amid surge in incursions into European airspace since mid-September

Belgium’s national security council will hold an emergency meeting on Thursday after drone sightings at airports caused chaos for travellers and raised security concerns.

Arrivals and departures were halted for several hours on Tuesday evening at Belgium’s busiest airport, Brussels, leading to the cancellation of dozens of flights. The skies were also closed over Liège airport, an important hub for freight transport, leading to further cancellations, delays and diversions.

Meanwhile, the mayor of the Flemish town of Diest reported that police and army officers had spotted four drones at the nearby Schaffen military airbase on Tuesday.

Before the latest sightings, Belgian authorities were already investigating mystery drone sightings at several military bases over the weekend, including Kleine-Brogel, near the Dutch border, which is home to Belgium’s F-16 fighter jets and widely reported to store US nuclear weapons.