Canadian energy company Husky Energy says between 52,834 gallons (200,000 liters) and 66,043 gallons (250,000 liters) of crude oil and other material has leaked into the North Saskatchewan River in west-central Canada.

Husky Energy said Friday that booms are being used in an effort to contain the spill, which leaked Thursday morning near Maidstone, Saskatchewan.

Saskatchewan Mayor Ian Hamilton says in the event any oil makes it through to North Battleford, the city will shut down its water treatment plant, which draws its supply from the North Saskatchewan River.

The pipeline runs from Husky's heavy oil operations to its facilities in Lloydminster, between the border of Alberta and Saskatchewan, and carries oil mixed with a lighter hydrocarbon, called a diluent, that's added to ease the flow.