More defendants added to lawsuit against railway involved fatal Quebec train derailment

More defendants have been added to a class-action lawsuit against the U.S. rail company whose oil train derailed and exploded, killing 50 people in Quebec.

The team of lawyers says the lawsuit has been amended to include Irving Oil, which runs a refinery in Saint John, New Brunswick, and World Fuel Services and its subsidiary, Dakota Plains Holdings.

The lawsuit initially was only against Montreal, Maine & Atlantic railway and its employees.

The train was carrying crude oil sold by Dakota Plains Holdings at the time of the July 6 derailment.

The lawyers allege the newly named defendants failed to ensure the highly flammable contents in the tankers were properly contained and safely transported. Officials at Irving Oil, World Fuel Services and Dakota Plains didn't immediately return messages seeking comment.