Poland's LOT airline has been forced to cancel around 10 foreign and domestic flights after hackers attacked its computers.
Airline spokesman Adrian Kubicki said the hacker attack temporarily paralyzed LOT's computers at Warsaw's Frederic Chopin airport on Sunday, disrupting the processing of passengers for the flights.
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He said some 1,400 passengers, scheduled to fly to Hamburg, Dusseldorf, Copenhagen and domestic destinations, were affected by the cancellations.
The problem was eventually solved and flights scheduled to depart later Sunday could leave as planned. A commission will investigate the source of the attack, Kubicki said.