The train that derailed and exploded in Lac-Megantic, Canada, had been parked and the conductor was not aboard when "somehow, the train got released".
"We're not sure what happened, but the engineer did everything by the book. He had parked the train and was waiting for his relief", Montreal, Maine and Atlantic Railway, Inc Vice President Joseph McGonigle said.
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A band of heavy rain is heading for the UK, threatening to make the May Bank Holiday a washout, the Met Office has warned.
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