Indigenous rights groups praised Peru's petroleum agency on Thursday for excluding areas where isolated tribes live from an auction of oil and gas concessions. Rights groups say the decision is a turnaround for Perupetro, which previously had indicated it might open up the protected areas for bidding. "This decision acknowledges a certain standard ... that there will be no exploration or extraction of natural resources on lands inhabited by un-contacted tribes," said David Hill, a researcher with Survival International, an advocacy group.