At 03:30 pm KST (06:30 GMT) of May 2, 2014, a first-generation Seoul Metro 2000 series train crashed into another similar one on Line 2 at Sangwangsimni Station.

[4] Another witness said many passengers forced the doors open and escaped onto the tracks after ignoring the onboard announcement which told them to stay inside the cars.

[9] YTN television reported one subway car was derailed, so passengers had to walk a short distance along the tracks to the station.

[6] The CEO of Seoul Metro later revealed that a faulty Automatic Train Stop signaling system was responsible for the incident.

[7] On 1 February 2015, the Seoul Eastern District Prosecutors' Office indicted 5 train employees and released a prosecution report.