Broadcaster YTN aired dashcam footage showing the towering deck of the overpass suddenly collapsing and slamming onto the road below.
The massive road network is still being built and no passenger cars were around the construction site.
Acting Interior and Safety Minister Koh Ki-dong urgently ordered relevant agencies, including the fire and police departments, to “mobilize all available equipment and personnel for rescue efforts, while ensuring the safety of firefighters,” according to the ministry’s press release.
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