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FILE - In this Oct. 4, 2011, file photo, a core sample drilled from underground rock near Ely, Minn., shows a band of shiny minerals containing copper, nickel and precious metals, center, that Twin Metals Minnesota LLC, hopes to mine near the Boundary Waters Canoe Area Wilderness in northeastern Minnesota. Opponents of the proposed Twin Metals copper-nickel mine sued Wednesday, May, 6, 2020, to challenge the federal government's renewal of the company's mineral rights leases, saying the government failed to conduct a full-scale environmental review of the project. (AP Photo/Steve Karnowski, File)

Opponents file new challenge to proposed Twin Metals mine

May. 6, 2020 4:40 PM EDT

MINNEAPOLIS (AP) — Opponents of a proposed copper-nickel mine in northeastern Minnesota sued Wednesday to challenge the federal government's renewal of Twin Metals' mineral rights leases, saying the government didn't conduct a full-scale environmental review of the project near the Boundary Waters Canoe...