LOT airlines, Poland’s flagship carrier, was attacked by hackers on Sunday, June 21, grounding 10 flights and causing 12 others to be delayed at Warsaw’s Chopin Airport. About 1,400 passengers were affected.
The company posted to its Facebook page that the hack targeted computer systems used to issue flight plans:
Today afternoon we encountered IT attack, that affected our ground operation systems. As a result we're not able to create flight plans.