The operator of the Keystone oil pipeline restarted the system Monday after a spill onto farmland in North Dakota last week ...

A portion of the Keystone Pipeline ruptured near Fort Ransom, North Dakota, around 7:44 a.m., according to local reports.

Officials do not know how much oil leaked from the Keystone Pipeline after an employee heard a loud noise Tuesday morning.

Officials say the Keystone oil pipeline has ruptured in North Dakota, with the spill confined to an agricultural field ...

BISMARCK — The operator of a portion of the Keystone pipeline that runs through North Dakota estimates about 3,500 barrels, ...