Overview
- Steel reinforcement bars collapsed around 1:22 p.m. during concrete pouring at the Sinansan Line site near Yeouido Station, about 70 meters underground.
- Seven workers were initially trapped; all were evacuated by firefighters from the tunnel area and vertical shaft.
- A 53-year-old driver of a concrete placement vehicle was found in cardiac arrest and later pronounced dead at a hospital.
- Two others were treated for minor injuries, including an ankle injury to a man in his 50s and wrist scrapes to a foreign worker in his 30s.
- POSCO E&C halted work at the site, and company president Song Chi-young visited the scene to apologize and commit to transparent cooperation with investigators.