A massive crowd surged at a music concert in South Korea on Monday, killing 11 people and injuring over 40 others, news reports said. More than 5,000 surged to enter one of the gates at a stadium in the southwestern city of Sangju, and those waiting at the front fell and were crushed by the surging crowd, the organizer of the concert, the broadcaster MBC, said in a news report. Eight of the 11 killed were elderly or children, MBC said. More than 40 people were injured in the accident, but there may be more casualties, MBC added.