A glitch in Japan Airlines' passenger check-in system has affected more than 23,000 passengers.

JAL officials said the system for domestic flights began malfunctioning at around 6:50 a.m.

The trouble knocked out automated check-in machines and a service called Touch & Go that makes boarding easier for customers with mobile devices.

JAL said the cause of the trouble was its recently introduced J-Server system, one of whose two lines of servers went down.

Engineers managed to restore the system about 2 hours later by separating affected servers from the rest of the system.

JAL canceled 34 domestic flights and had delays. About 23,500 people were affected as of 8 p.m.

Delays are expected to continue throughout the night.

JAL says it will keep customers updated through its website.

Source: ANNnewsCH