Roughly 70,000 gallons (264,978 litres) of oil from a pipeline spilled into the ground in Wisconsin, officials said.

A northern Wisconsin tribe along with a coalition of groups moved Thursday to block plans to reroute an aging pipeline around the tribe's reservation, arguing state regulators have underestimated the environmental damage that construction would cause.

Calgary-based pipeline giant Enbridge says it has cleaned up about 60 per cent of a nearly 265,000-litre oil spill in Wisconsin that was discovered last month.