
Hospital officials, speaking on condition of anonymity, confirmed the 16 deaths, Reuters news agency reported.
When the grate gave way, concert-goers plunged 20 meters, or 65 feet, into an underground parking area. It is not clear what caused the grate’s collapse.
South Korea is still recovering from the disastrous April 15 sinking of the ferry MV Sewal, which killed more than 300 people, mostly high school students.
That incident had sparked discussion of stricter regulatory oversight.