Richmond teacher named national teacher of the year

Music fans fall to their death when grate over ventilation shaft collapses during concert

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SEONGNAM, South Korea —  At least 16 people died Friday when a grate over a ventilation shaft collapsed at an outdoor concert in Seongnam, South Korea, an official with the National Emergency Management Agency told CNN.

Here is video taken at the scene of the concert tragedy.

About two dozen people fell some 10 meters (33 feet), according to the official, who declined to be identified because he is not authorized to speak to the media. The accident occurred during an outdoor concert at a multipurpose venue called Pangyo Techo Valley, according to South Korea's Yonhap news agency.

This is a developing story.

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