Three more bodies were found Friday in the tunnel of iron mines in Shahe, north China's Hebei Province, raising the number of dead to 68.
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119 miners remain missing, said an official with the investigation group.
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Zhang Fumin said that the investigation group, sent by the State Council, started an all-round investigation Thursday.
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Preliminary investigation shows that the "November 20" fire broke out due to an electronic cable self-igniting in one iron mine. The fire soon spread to other four mines. Nine people closely related to the disaster were detained by police.

(Xinhua News Agency November 27,2004)