A cyberattack targeting a service provider for check-in and boarding systems has disrupted operations at several European airports, causing flight delays and cancellations at Brussels airport, the operator said in a statement.
The attack has rendered automated systems inoperable, allowing only manual check-in and boarding procedures, according to Brussels Airport.
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"This has a large impact on the flight schedule and will unfortunately cause delays and cancellations of flights," the operator said in a statement published on its website.
"The service provider is actively working on the issue and trying to resolve the problem as quickly as possible."
Passengers with a flight scheduled for Saturday were advised to confirm their travel with airlines before heading to the airport.