Warning for travellers as drone sighting halts flights again
Related: How Ukraine and Russia are playing out a deadly cat and mouse drone war from underground bunkers
Liegeairport in Belgium temporarily halted flights for the second time in a week following a drone sighting, causing a 30-minute closure.
The incident follows earlier drone disruptions at Brussels and Liege airports, which led to flight diversions and groundings.
Belgium's Defence Minister Theo Francken suggested the drone flights, including those near a US nuclear weapons base, were a "spying operation" by professionals aiming to destabilise the country.
Similar drone sightings have caused significant disruptions at airports and military bases across Europe, with some authorities attributing them to Russia's "hybrid warfare", a claim Moscow denies.
In response to such threats, Poland and Romania announced the deployment of the American-made Merops system, designed to identify and intercept drones.