The explosion at one of GM's suppliers in China back in August is now believed to have killed 146 people, double previous estimates.

The Wall Street Journal reports on the official government assessment of the blast, caused by too much dust igniting at Kunshan Zhongrong Metal Production Co.

The company primarily electroplates aluminum-alloy wheel hubs. GM claims they did not have direct contact with the company, which the WSJ states is standard for lower-tier supplier relationships in the auto industry.

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