A burnt tree stands near the remains of a train derailment in Lac Megantic, Quebec
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Canada train blast: Blame game over Lac-Megantic disaster

9 July 2013 Last updated at 23:26 BST

A rail firm and fire department appear to be pointing the finger at one another over a Canadian oil train blast that has killed at least 15 people.

Investigators say the tragedy may have been caused by a chain of events stemming from an earlier fire.

Shortly after fire crews put out a blaze on the train, it experienced brake failure, ran away and exploded in the Quebec town of Lac-Megantic.

Around 50 people are still missing.

David Willis reports.