Japan Airlines said it was hit by a cyberattack on Boxing Day, causing flight delays and disruption—here’s what we know so far.

Japan Airlines said it was hit by a cyberattack Thursday, causing delays to more than 20 domestic flights but the carrier said it was able to stop the onslaught and restore its systems hours later. There was no impact on flight safety,

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A cyberattack on Japan Airlines disrupted several flights at Tokyo’s Haneda Airport on Thursday. The attack targeted the company's internal servers. Police are investigating the source.

Shortly before the Japan Airlines outage, American Airlines Group Inc. also had to delay flights on account of a networking issue. The incident, which lasted for about one hour on Christmas Eve, was attributed to a problem in a piece of partner-managed network equipment. The issue has since been resolved.

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

Japan A Thursday, causing delays to more than 20 domestic flights but the carrier said it was able to stop the onslaught and restore its systems hours later. There was no impact on flight safety, it said.

Japan Airlines reported a cyberattack on Thursday that caused delays to domestic and international flights but later said it had found and addressed the cause. The airline, Japan's second biggest after All Nippon Airways (ANA), said 24 domestic flights had been delayed by more than half an hour.

Japan Airlines Co. said it has resumed ticket sales for international and domestic flights after resolving a system malfunction caused by a cyberattack on Thursday morning.