TransCanada crews safely shut down its Keystone pipeline at approximately 6 a.m. CST after a drop in pressure was detected in its operating system resulting from an oil leak that is under investigation. The estimated volume of the leak is approximately 5,000 barrels... Crews, including TransCanada specialists from emergency management, engineering, environmental management and safety as well as contracted, nationally recognized experts are assessing the situation. TransCanada is providing State and Federal regulators, including the Pipelines and Hazardous Materials Safety Administration and the National Response Center, with accurate and confirmed information on an ongoing basis... 

The safety of the public and environment are our top priorities and we will continue to provide updates as they become available.