A cyberattack disrupted Japan Airlines’ operations Tuesday, with Nikkei reportings extensive delays as the carrier works to restore normal service.

Japan Airlines was hit by a cyberattack on Thursday affecting its internal and external systems, broadcaster NTV said.

Japan Airlines said it was hit by a cyberattack Thursday, causing delays to more than 20 domestic flights but the carrier said there was no impact on flight safety. JAL said the problem started Thursday morning when the company's network connecting internal and external systems began malfunctioning.