Reported by Chosun Biz that Ministry of Land, Infrastructure and Transport announced on the 11th that it has formed an accident response headquarters to respond to the collapse accident at the Shin Ansan Line underground tunnel construction site in Gwangmyeong, Gyeonggi Province. Reports say collapse happened in the afternoon at around 15:00.

Initially two people were under collapse. One worker in his 20s was in an excavator and has been buried 30 meters underground. He was rescued 13 hours after collapse. Another worker missing. 17 Hours before the collapse there were already signs of cracks in the structure. Upon detection of cracks, construction stopped. Workers evacuated. But 2 people were effected when it collapsed 17 hours later.

Different sources says collapse occurred in 2Arch structure use where site is not wide and the middle support pillar is required.