The approximately 600,000-bpd Keystone oil pipeline from Canada to the United States remained shut down Wednesday after an oil spill near Fort Ransom, North Dakota, on Tuesday released an estimated 3,

The latest leak in the Keystone oil pipeline in North Dakota on Tuesday continues the troubled history of the 15-year-old pipeline.

* A 2021 report from the U.S. Government Accountability Office found there had been 22 spills from the pipeline between 2010 and 2020. The report said while Keystone's accident history has been similar to other crude pipelines, the severity of spills has worsened in recent years.

The latest spill comes two years after the U.S. Pipeline and Hazardous Materials Safety Administration (PHMSA) identified what it called a pattern of "increasingly frequent incidents" on the Keystone system.

Trucks and workers started a cleanup effort at the site of a spill of the Keystone oil pipeline in rural North Dakota.

An estimated 3,500 barrels of oil spilled in a field near Fort Ransom, N.D., and the release was contained, the pipeline’s operator said.