CHEYENNE, Wyo. (AP) - An environmental group hoping to block construction of a $3 billion gas pipeline from Wyoming to Oregon has filed suit.

The Tucson, Ariz.-based Center for Biological Diversity says the Ruby Pipeline would cut across "pristine and remote lands" and harm endangered fish.

The group sued the U.S. Bureau of Land Management and U.S. Fish and Wildlife Service in federal court in San Francisco on Friday. A spokesman for El Paso Corp., parent company of Ruby Pipeline, LLC, declined to comment.

The Federal Energy Regulatory Commission issued a notice to proceed for the project Friday.

BLM project manager Mark Mackiewicz says initial work probably will begin Monday. He says the BLM and Ruby Pipeline worked hard to address environmental concerns.