BRUSSELS (Reuters) -A cyberattack targeting a service provider for check-in and boarding systems has disrupted operations at several major European airports including London’s Heathrow, Brussels and Berlin, causing flight delays and cancellations, the operators said.

The attack has rendered automated systems inoperable, allowing only manual check-in and boarding procedures, according to Brussels Airport.

“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.”

Heathrow also warned of delays caused by “a technical issue” at a third-party supplier.

Passengers

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