Japan Airlines (JAL) said on Thursday its systems returned to normal, with same-day ticket sales resuming, after a cyberattack delayed some domestic and international flights. The attack began at 7:24 a.

Japan Airlines has been hit by a cyberattack that caused delays to more than 20 domestic flights, but it managed to restore its systems within hours.

The airline also temporarily stopped selling tickets for flights departing Thursday, but said that there was no impact on flight safety.