London, Ont. train fire: How sparks from locomotive exhaust may have played a role [Video]

The Transportation Safety Board is providing more information into the circumstances surrounding a train travelling through a major Ontario city while up in flames last month.

The blazing CPKC train travelled eastward through much of London, Ont., just before 11 p.m. on April 21, shocking onlookers and prompting the fire department to urge area residents to stay indoors as crews battled the flames.

The train eventually came to a stop around Waterloo and Pall Mall streets and firefighters were able to get the flames under control just after 1 a.m. April 22. The smouldering train was then moved a few blocks east to the railway yard that stretches between Adelaide and Quebec streets, just north of Central Avenue, where crews continued dousing hot spots.

At the time, firefighters had said the impacted train cars contained used wooden railway ties, which are used in laying railway tracks. No injuries were reported.

On Wednesday, the Transportation Safety Board said that “after …