Flights at Belgium’s main international airport remained disrupted on Wednesday after drone sightings overnight forced it to close temporarily, and Prime Minister Bart De Wever called a meeting with senior ministers to discuss safety concerns. It was the first time that the airport in Brussels had been shut down by drones. It comes after a series of unidentified drone flights over the weekend near a military base . Brussels Airport said delays and cancellations were still possible after the Tuesday evening shutdown “for safety reasons” and apologised, saying that “the safety of our passengers and staff remains our top priority.” De Wever convened a meeting of Belgium’s National Security Council, which includes the country’s defence, interior, justice and foreign ministers, for Thursday morning.