Sixteen people watching an outdoor pop concert of K-pop group 4Minute in Seongnam, South Korea fell 10 meters to their deaths Friday when a ventilation grate they were standing on collapsed, according to CNN report.
They say a ventilation grate collapsed and 20-30 concert-goers fell into an underground parking area.
About 700 people had gathered to watch the concert, which was part of a local festival, the Yonhap South Korea news agency reported.
Most of the dead and injured were students, the YTN news channel said, adding that the concert organisers had repeatedly urged the group to move off the grate before it collapsed.
11 others were reportedly seriously injured.