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A policeman works at the site of a stampede in Maligawatta of Colombo, Sri Lanka, on May 21, 2020. Three people were killed when a stampede broke out in Maligawatta, in Sri Lanka's capital Colombo on Thursday during a donation drive while the capital remained under a curfew amid the COVID-19 pandemic, police said. (Photo by A.Hapuarachchi/Xinhua)