The operator of a train that rolled downhill and careened into a Quebec town, causing a deadly explosion, said the air brakes used to hold the locomotive in place may have been released after the train was parked.
The train had been hauling crude oil from North Dakota to eastern Canada, and was sitting parked, without a driver, outside town when it began to roll downhill, gathered speed and derailed on a curve at 1 am (0500 GMT) on Saturday.
The statement from Montreal, Maine & Atlantic Railway did not make clear how the brakes had been disengaged, or who could be responsible.
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