Eleven people died after the roof of a school gym collapsed in northeastern China, state media reported yesterday. 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. An in-depth investigation of the accident was in progress, state media CCTV has said, with those in charge of the construction company having been placed in police custody.

11 killed after school gym roof collapses in northeastern China
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