Still unexplained
The hunt for the origins of Covid-19 has for the past four years been a tangled web of politics, power struggles, and international finger-pointing.
An explosion has rocked a kindergarten in east China's Jiangsu province on Thursday, officials said.
The blast happened around 4.50 p.m. at the gate of the kindergarten in Fengxian county when children were leaving school, according to the emergency office of Xuzhou City, which administers Fengxian, Xinhua news agency reported.
Witnesses said there were casualties, but the exact number is not established.
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Local officials have rushed to the scene. Who or what caused the blast is yet unclear.
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