An employee on a pump station heard what was described as a mechanical bang early Tuesday morning, an official told CBS News.

The nearly 2,700-mile Keystone oil pipeline was shut down Tuesday morning after it ruptured in North Dakota, halting the flow of millions of gallons of crude oil from Canada to refineries in the U.S.

South Bow (NYSE:SOBO) -5.9% in Tuesday's trading after the 2,700-mile Keystone oil pipeline was shut down this morning after it ruptured in North Dakota, halting the flow of thousands of gallons of crude oil from Canada to refineries in the U.

The nearly 2,700-mile Keystone oil pipeline was shut down Tuesday morning after it ruptured in North Dakota, halting the flow of millions of gallons of crude.S. and potentially leading to higher gasoline prices.

The Keystone oil pipeline was shut down Tuesday morning after a rupture in North Dakota halted the flow from Canada to U.S. refineries. South Bow, which manages the pipeline, said the pipeline was

A portion of the Keystone oil pipeline has ruptured, forcing it to be shut down in North Dakota. It is not known what caused the break and the amount of crude oil that flowed into an agricultural field in Fort Ransom,