Airport disruptions that affected automated check-in systems in recent days were caused by a ransomware attack, the EU's cybersecurity agency says, highlighting the growing risks of such attacks to critical infrastructure and industries.

Several of Europe's biggest airports still faced disruptions on Monday after hackers knocked out automated check-in systems provided by Collins Aerospace, owned by RTX, affecting dozens of flights and thousands of passengers since Friday.

"Law enforcement is involved to investigate" malicious software that locks up data until the victim pays to have access restored, the ENISA agency said in Monday, without saying where the ransomware attack originated from.

Governments and companies have been the targets of cyberattacks in recent months, including luxur

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