BEIJING — At least nine people have been killed and nine others trapped in mining and tunnel building accidents in China, state media reported Thursday.

Nine miners were killed in a gas explosion deep inside a shaft on Wednesday afternoon in the northeastern province of Heilongjiang, the official Xinhua News Agency reported. Eight others were rescued and taken to a hospital.

Separately, Xinhua said nine workers were trapped when a railway tunnel they were working on collapsed Thursday morning in the southwestern province of Yunnan near the border with Laos.

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