Analysis of information sources in references of the Wikipedia article "Tres Fronteras" in English language version.
The work of the vigilance team quickly drew attention from local fishermen who sell tons of threatened river fish across the nearby border with Peru. Illegal fishing, mining and poaching in the area is often financed by criminal groups laundering money from a growing cross-border drug trade, according to state and federal police.
Much of the cocaine sold in Rio is said to arrive through Tabatinga, a smuggling mecca lost on Brazil's tri-border with Peru and Colombia, around 700 miles upriver from Manaus.
