Indigenous federations block river traffic to demand an independent environmental audit. [To protest the Camisea gas pipeline's]...fourth spill in only 15 months of operation...three indigenous federations representing communities located along the Urubamba River...blocked river traffic for 15 days... Similar spills have killed fish and animals, the principal source of food for indigenous communities in the Camisea region. [Camisea consortium includes Pluspetrol, Hunt Oil, SK, Techint, Sonatrach, Grana y Montero, Tractebel (part of Suez)]