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 dis

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