TransCanada sends more crews to South Dakota's Keystone pipeline leak

TransCanada Corp. says the company has sent additional crews and equipment to the site of a 795,000-litreoil spill from its Keystone pipeline in South Dakota.

TransCanada said Saturday it is making progress in its investigation into the cause of the spillon farmland in Marshall County, near the North Dakota border, about 400kilometreswest of Minneapolis.

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But the company did not elaborate on the cause. The company says additional equipment and workers continue to be dispatched to the site.

Crews shut down the pipeline Thursday after discovering the leak.

TransCanada says the leak is under control and there is no significant environmental impact or threat to the public.

Nebraska regulators vote Monday on a proposed Keystone XL route, an expansion that also would be operated by TransCanada.