Reuters: Ecuador’s attorney general on Saturday urged the government to negotiate with oil firms to stop drilling for crude in a protected area deep in the Amazon jungle where Indian tribes hide from the outside world. That recommendation could affect operations of Spain’s Repsol <REP.MC>, Brazil’s Petrobras <PETR4.SA>, China’s Andes Petroleum and Ecuador’s state oil company Petroecuador. Those companies have part of their oil blocks inside the 700,000 hectare (1.7 million …