New Delhi, Sept. 21 -- A cyberattack on a US-based software system provider has disrupted operations at several European airports, extending into a second full day on Sunday. The impact of the breach is poised to worsen for at least one major airport.

The attack which began late Friday, affected electronic check-in systems, causing dozens of cancellations and delays in flights.

The affected software belongs to Collins Aerospace, whose systems help passengers check in, print boarding passes and bag tags, and dispatch their luggage. While the origin of the attack remains under investigation, experts suggest that it could be hackers, criminal organizations or even state actors, AP reported.

Brussels airport has been impacted most signific...