BEIJING, July 24, 2023 (AFP) – Eleven people died after the roof of a school gym collapsed in northeastern China, state media reported Monday. The collapse in Qiqihar, Heilongjiang Province was caused by construction workers illegally placing perlite — a form of volcanic glass — on the building’s roof, state news agency Xinhua said. Heavy rain then led the perlite to expand and increase in weight, causing the roof to collapse, it added. Footage aired […]