Canadian oil supplies to the U.S. Midwest were disrupted after Enbridge Inc. (ENB.TO 2.51%) shut a pipeline because of a leak.

 

The company isolated its Line 4 pipe at the Regina terminal in Saskatchewan yesterday after about 1,350 barrels of oil were released within an on-site pumping station, according to a statement. The company is excavating the line around a pumphouse and hasn't provided an estimate for how long repairs may take, Gerard Kay, deputy chief of operations at Regina Fire and Protective Services, said by phone.