LONDON — A cyberattack targeting a third-party system provider has caused widespread disruptions at several major European airports, including London’s Heathrow, Brussels, and Berlin, authorities confirmed Saturday.

Brussels Airport reported at least four flight cancellations on Saturday morning — including departures to Rwanda and Amsterdam — after the Friday night attack disabled automated check-in and boarding systems.

The airport warned that only manual check-in procedures were available, with a “large impact on the flight schedule” expected throughout the day.

Berlin Airport also cautioned passengers to expect “longer wait times than usual,” while London Heathrow cited a “technical issue” linked to Collins Aerospace, which supplies check-in and boarding systems to airlines worldwide.

“We advise passengers to check their flight status with their airline before travelling,” Heathrow said, adding that extra staff had been deployed.

Collins Aerospace confirmed the cyberattack targeted its MUSE software, which manages passenger check-in and baggage drop at select airports.

“The impact is limited to electronic customer check-in and baggage drop and can be mitigated with manual operations,” the company said in a statement, stressing that teams were working to restore full functionality “as quickly as possible.”

Despite the outage, budget carrier EasyJet said its operations remained unaffected.

Authorities in Brussels and Berlin said the duration of the disruption remained unclear as recovery efforts continued. — Agencies