Canadian officials continued their investigation Thursday into a deadly train derailment that set off a fiery explosion in Quebec. At least 15 people were killed and 35 are still missing.
The freight train was operated by Montreal, Maine and Atlantic Railway.
The train had been stopped Saturday for a crew change when it began to roll downhill without a conductor. It derailed at a curve in the tracks and several of its cars exploded near the town of Lac-Megantic.
All but one of the train's 73 cars were carrying oil. The fiery blast incinerated 30 nearby buildings and forced thousands from their homes.
Edward Burkhardt, head of the railway's parent company, blamed the train's engineer for "improperly setting its brakes" before the disaster.