News Summary

• The cyberattack affected software of Collins Aerospace, whose systems help passengers check in, print boarding passes and bag tags.
• Brussels Airport said 45 outbound and 30 inbound flights were cancelled on Sunday, more than double the number a day earlier.
• It was not immediately clear who might be behind the cyberattack, but experts said it could turn out to be hackers, criminal organizations, or state actors.
• The airports advised passengers to check the status of their flights before traveling to the airports, and using alternative check-in methods.