Smoke being visible on their closed-circuit television monitors, subway officials radioed the operator of train 1080, Choi Sang-yeol (Hangeul: 최성열), advising him to proceed with caution because there was a fire in the station. Train 1080 entered Jungangno station and stopped alongside blazing train 1079 approximately four minutes later. The doors opened only briefly, then shut, apparently in an effort to keep out the toxic smoke that had filled the station. Shortly after train 1080's arrival, an automatic fire detector shut down the power supply to both trains, preventing train 1080 from leaving the station.