Incident happened while workers were doing maintenance in an underground enclosure at the coal-fired power plant.
Investigators were trying to pinpoint what caused the 1.5-ton cast iron boiler to blow up.
Incident occured in Campbellford, Ont., north of Trenton.
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A bag of sodium cynanide was discovered in the 38-year old electroplating company employee’s pocket.
Cause of the explosion has yet to be identified; also injured two other workers.
A South Korean court has ruled two cancer-related deaths were caused by iffy conditions at semiconductor factories