CYBERSECURITY

Hackers Ground 1400 Passengers in Poland

At least 10 flights were canceled and an additional 12 delayed after hackers attacked the central computer system of Poland’s national airline Sunday. More than 1,400 LOT passengers were affected by the glitch at Warsaw’s Okecie airport, but officials said service was back to normal by Sunday evening. Flights to Dusseldorf, Hamburg, Copenhagen, and Polish cities were affected. The source of the hack was not immediately clear.