BRUSSELS/BERLIN >> Some of Europe’s biggest airports battled to restore normal operations on Sunday after hackers disrupted automatic check-in systems, with Brussels asking airlines to cancel half of Monday’s flight departures due to persistent problems.

Hackers on Friday targeted check-in and boarding systems provider Collins Aerospace, owned by RTX, disrupting operations at London’s Heathrow – Europe’s busiest airport, Berlin Airport and in Brussels.

Passengers faced long queues, cancellations and delays on Saturday. While the disruption eased significantly in Berlin and Heathrow on Sunday, according to airport officials and data, delays and flight cancellations were continuing.

A spokesperson for Brussels Airport said Collins Aerospace had not yet delivered a secure, updated version

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