Seven workers were trapped in an accident site at a construction site near Yeouido Station in Seoul, Thursday. According to police reports, steel reinforcements collapsed around 1:22 p.m. at the Sinansan Line underpass construction site, near Exit 2 of Yeouido Station. The accident trapped the workers who were working around 80 meters underground. One of the workers was found in cardiac arrest and was transported to a nearby hospital while receiving treatment. This is a developing story.