Belgium’s air traffic was severely disrupted after drone sightings forced two major airports to temporarily suspend operations as a security precaution.

A drone was first spotted near Brussels airport at 8pm (19:00 GMT) on Tuesday evening, followed by another incident at the nearby Liege airport, one of Europe’s largest cargo airports, according to Belgium’s public broadcaster RTBF.

Both airports suspended operations for an hour and reopened at 9pm (20:00 GMT), only to shut down again at 10pm (21:00 GMT) after a second sighting, RTBF said. Both airports resumed normal operations at 11pm (22:00 GMT).

Brussels airport said that the shutdowns may still impact air traffic on Wednesday in a notice on its website.

“Following drone sightings on Tuesday evening, flight operations at Brussels A

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