Yonhap News Agency reported that the problem occurred at about 4:18 a.m. Thursday at Oido Station on the Ansan Line in Siheung, south of Seoul, delaying nine trains by 10 to 30 minutes.
KORAIL said an initial response team was dispatched and service returned to normal at about 6:08 a.m. It said trains were running normally but some residual impact could continue into the morning commute.
* This article has been translated by AI.
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