Daily SumUp

The Keystone pipeline system, which carries crude oil from Canada to the United States, was shut down on Tuesday morning because of an oil spill in southeastern North Dakota, government and company officials said.

The pipeline ruptured north of Fort Ransom, N.D., said Bill Suess, manager of the spill investigation program at the North Dakota Department of Environmental Quality, a state agency. The size and cause of the spill in that city, about 78 miles southwest of Fargo, were not known, he said, and the authorities had also not said when the pipeline could be back in operation.