Tesoro detected anomalies on North Dakota pipeline before spill

Oct 17 (Reuters) - Tesoro Logistics LP on Thursday said it detected anomalies during an inspection of its 20-year-old North Dakota pipeline days before the line leaked more than 20,000 barrels of oil onto farmland.

The pipeline was carrying Bakken oil to a rail facility in North Dakota when it ruptured. A farmer harvesting wheat on his land discovered the leak Sept. 29.