HELENA, Mont. -

A conservation group has filed a lawsuit seeking documents concerning Attorney General Tim Fox's joining other states in protesting Bureau of Land Management plans to regulate hydraulic fracturing on federal land.
    
Lee Newspapers of Montana reports that the Montana Environmental Information Center filed the lawsuit against Fox late last week in state District Court in Helena.
    
In August, Fox joined attorneys general in Alabama, Alaska and Oklahoma in sending a letter to U.S. Interior Secretary Sally Jewell expressing "serious concerns" and "strong objection" to proposed rules governing hydraulic fracturing.
    
Also known as fracking, the technique boosts production from oil and gas wells by pumping pressurized water into the wells.
    
The conservation group contends Fox is refusing to comply with public records laws in not releasing documents the group requested.