A group opposed to Rosemont Copper's plan for a new mine southeast of Tucson are appealing state environmental regulators' approval of a permit for the project.
The Arizona Daily Star reports that the appeal was filed by Save the Scenic Santa Ritas.
The group says the Department of Environmental Quality based its Jan. 31 decision on an outdated plan and didn't consider the likelihood of air quality violations.
The department says it made the right decision, and Rosemont Copper says it appears the appeal will be rejected as unfounded.
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The Islamic State militant group released a video Tuesday that it claimed shows the beheading of American journalist Steven Sotloff.