The Transportation Safety Board is sending a team of investigators to a CP train derailment west of Moose Jaw, Sask.
It happened Thursday afternoon near Caron, about 40 kilometres west of the city.
More than 20 cars left the tracks.
The railway says most of the derailed cars contained gasoline, but there were also cars with lumber and asphalt on the ground.
Nothing leaked during the incident, Moose Jaw fire officials said.
The TSB said it will gather information and find out what caused the derailment.