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DALIAN: Eight steel workers were confirmed dead on arrival at hospital Monday in Dalian, a coastal city in northeastern China's Liaoning province, local work safety watchdog said Tuesday morning.
Yang said preliminary blood tests showed no sign the victims had been electrocuted, but there were signs of carbon monoxide and other unidentified gases in the blood.
However, according to doctors the workers could have died of serious oxygen deficiency, as the 1.45-m-deep underground workshop had a floor space of only a dozen square meters or so and had been closed for a long period of time.
Yang said experts would try to ascertain the cause of deaths after autopsy Tuesday.