Keystone Pipeline leaks 210,000 gallons of oil in South Dakota

A total of 210,000 gallons of oil leaked Thursday from the Keystone Pipeline in Marshall County, South Dakota, the pipeline’s operator, TransCanada, said.

Crews shut down the pipeline Thursday morning and officials are investigating the cause of the leak.

This is the largest Keystone oil spill to date in South Dakota, said Brian Walsh, a spokesman for the state’s Department of Environment and Natural Resources.