Belgium opens probe into Brussels Airport drone sighting
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Belgian intelligence services believe Russia is behind a series of drone flights detected in recent weeks over military bases and airports.
The country's Defence Minister Theo Francken said it looked like an espionage operation, but he wanted to be "cautious" about speculating.
Belgium's defense minister said that more counter-uncrewed aerial systems "are urgently needed" after three drones spied on the Kleine-Brogel base.