Prosecutors in Brazil have opened an investigation after reports that illegal gold-miners on a remote Amazon river massacred at least 10 members of an "uncontacted" indigenous band. If confirmed, this means up to a fifth of the entire band have been wiped out. Two gold-miners have been arrested in the case. The killings allegedly took place last month along the Rio Jandiatuba in the Vale do Javari Indigenous Territory, a huge area  in Amazonas state bordering Peru. The region is known as the "Uncontacted Frontier," as it shelters more isolated peoples than anywhere else on Earth. Reports of the massacre only emerged after the miners started boasting about the killings, showing off "trophies" in the nearest town.

Colmbia's highest judicial body, the Fiscalía General, has opened investigations into the slaying six demobilized FARC fighters and nine family members of demobilized guerillas in apparent reprisal attacks since the peace accord took effect late last year. The attacks took place in the departments of Caquetá, Antioquia, Putumayo, Tolima, Cauca and Valle del Cauca. (El Espectador, July 27) But the wave of deadly attacks on social leaders across Colombia has also persisted, in spite of the peace process. Human rights group Global Witness, which annually releases a report on the world's most dangerous countries for environmental defenders, this year names Colombia as second only to Brazil. The group counts 37 environmental activists slain in Colombia in 2016, compared to 26 in 2015. In the first six months of 2017, the figure was already up to 22. (El Colombiano, July 19)

A consortium led by China Three Gorges Corp has agreed to buy a giant hydro-electric plant under construction in Peru from scandal-mired Brazilian company Odebrecht. The Chinese consortium, also including Hubei Energy Group, is reported to be paying $1.39 billion for the Chaglla power plant, which is located on the Río Huallaga in Chaglla and Chinchao districts of Huánuco region. The Chaglla complex has recieved  $150 million in funding from the Inter-American Development Bank and Japan's Sumitomo Mitsui Banking Corp. When completed, it will be Peru's third largest hydro-electric facility.

Brazil's government issued an order Aug. 23 abolishing a vast national reserve in the Amazon in order to open up the area to mineral exploitation. The National Reserve of Copper and Associated (RENCA), covering 46,000 square kilometers (17,800 square miles, an area larger than Denmark), straddles the northern states of Amapa and Pará, and is thought to be rich in gold, iron, manganese and other minerals. It was created in 1984 to protect the rich natural resources of zone. In announcing the dissolution of the RENCA, the Mines and Energy Ministry said the objective of the measure is "to attract new investments, generating wealth for the country and employment and income for society, always based on the precepts of sustainability." But opposition Senator Randolfe Rodrigues denounced the move as "the biggest attack on the Amazon of the last 50 years."

Amid fast-escalating nightmarish narco-violence in Brazil comes disconcerting word that police in Rio de Janeiro seized 60 assault rifles hidden in a shipment of swimming-pool heating equipment that had just arrived on a flight from Miami. Pulse News Agencyreported June 2 that the AK-47s and AR-10s were discovered in the cargo terminal of Rio's international airport. Photos of the haul showed weapons in the foam packaging they were flown in.

Bolivia and Brazil agreed to a joint plan to fight criminal gangs that operate on their shared jungle border, long porous for drug and arms traffickers. The decision was taken at a Brasilia meeting between Brazil's Justice Minister Osmar Serraglio and Bolivia's Government Minister Carlos Romero on May 13. The plan includes establishment of new border checkpoints in the Bolivian outposts of Bella Vista and Puerto Evo and the Brazilian villages of Costa Marques and Plácido de Castro. It establishes mechanisms for sharing intelligence, and operations to secure control of air-space over the border zone. It also calls for joint military training between the two countries.

Thousands of indigenous protesters clashed with police outside the congress building in Brasilia during an April 26 demonstration over territorial and land rights in the Brazilian Amazon. Police fired rubber bullets and tear-gas when some protesters tried to reach a ramp leading into the National Congress. Indigenous demonstrators in face-paint and traditional head-dresses shot arrows at police in return. The demonstration was called to oppose measures being pushed by the powerful agribusiness bloc in Brazil's Congress, the Bancada Ruralista, that would threaten indigenous lands in the Amazon. Topping the list is Proposed Constitutional Amendment 215, or PEC 215, that would shift responsibility on demarcating indigenous lands from the executive to Congress, where the powerful farm lobby holds sway.

Peru's prosecutor general Pablo Sánchez announced Feb. 7 that he is seeking the arrest of former president Alejandro Toledo on charges of laundering assets and influence trafficking. Prosecutors opened a formal investigation this week into allegations that Toledo took $20 million in bribes from Brazilian construction firm Odebrecht, with investigators raiding his home in Lima on Feb 4 and carting off boxes full of documents. Sánchez is now asking a judge to approve 10 months of "preventative detention" for Toledo while the case is under investigation. Toledo is currently believed to be in Paris, where he arrived for an OECD conference last week, and Sánchez argues that he poses a flight risk. Toledo is said to have received the money, laundered through offshore accounts, in exchange for giving the firm approval to complete a highway connecting Brazil with the Peruvian coast in 2006.