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Quintin said that investigations were underway to try to identify how many drones were involved
"We must act in a calm, serious and coordinated manner"

BRUSSELS: Belgian authorities on Wednesday investigated drone sightings that halted air traffic overnight at several airports, as flights resumed after hundreds of passengers were left stranded.
The main airport in Brussels and another in Liege had to suspend arrivals and departures late Tuesday for several hours after suspected drones were spotted nearby.
Dozens of passenger and cargo flights were cancelled and some 500 passengers forced to spend the night at Brussels Airport in the Belgian capital.
Interior Minister Bernard Quintin said that investigations were underway to try to identify how many drones were involved in the latest such incident in Europe and who was behind them.
The government was set to hold an emergency meeting of its national security council on Thursday to discuss the disruptions.
"The recurrence of drone-related incidents directly affects the security of our country," Quintin wrote on X.
"We must act in a calm, serious and coordinated manner."
The interruptions came after a recent spate of mysterious drone incidents targeting airports and sensitive military locations in several European countries, including Germany and Denmark.
Suspicions have swirled over potential Russian involvement in increased drone activity across Europe, with tension high as the war in Ukraine drags through its fourth year.
Over the weekend, Belgian authorities reported drone activity over the Kleine-Brogel military base, where a number of US nuclear weapons are believed to be stored.

- 'Trying to sow panic' -

A spokesman for air traffic controller Skeyes told AFP that flights had been able to restart by the early morning after the interruption.
Some 400-500 passengers had to spend the night at Brussels Airport because of the sightings, airport spokeswoman Ariane Goossens told AFP.
A spokesman for Liege airport -- a major freight hub that operates many overnight flights -- said the incidents were "worrying for national security".
Flights were able to start again at the airport in the early hours of Wednesday after a six-hour hiatus, spokesman Christian Delcourt said.
Authorities on Wednesday evening received several reports of a possible drone near a military barracks in Heverlee, east of Brussels, but local police could not confirm if the device had been a drone, a spokesperson told AFP.
Flemish media outlet HLN also reported more drone sightings near the Kleine-Brogel military base on Tuesday evening, but that was not confirmed by authorities either.
Defence Minister Theo Francken earlier refused to point the finger at Russia for the weekend sightings near the base, but said that they appeared to be a coordinated operation carried out by "professionals".
"They are trying to sow panic in Belgium," Francken told local media. "This is destabilisation."