According to Yonhap News and the Seoul Transportation Corporation, the incident occurred around 10:40 a.m. in the substation located on the first basement level of Anam Station. During the inspection, CO₂ was released into the station.
Upon detecting the gas, the corporation immediately implemented safety measures. All individuals inside the station, including passengers and staff, were evacuated, and access to the station was temporarily restricted to prevent further entry.
Train operations were also adjusted for safety. The corporation instructed trains on Line 6 to bypass Anam Station without stopping while the situation was being addressed. As a result, passengers intending to use Anam Station had to utilize nearby stations during the incident.
After confirming that all released CO₂ had dissipated and the station was safe, normal train operations and station services resumed at 11:01 a.m.
No injuries were reported as a result of the incident.
* This article has been translated by AI.
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