A mining company is asking protesters to leave the entrance of a planned nickel mine in Michigan's Upper Peninsula or face removal by police.
The protesters include members of the Keweenaw Bay Indian Community, who believe the mine entrance would desecrate a rock outcrop that they consider sacred ground.
Deb Muchmore, a spokeswoman for Kennecott Eagle Minerals, says company officials visited the site Thursday and asked protesters to leave. In the past month, there have been up to 20 people camping at the site.
The entrance is state land that Kennecott is leasing.
Kennecott believes the mine in Marquette County could produce as much as 300 million pounds (135 million kilograms) of nickel and about 200 million pounds (90 million kilograms) of copper. Kennecott is owned by London-based Rio Tinto PLC.