 Several tons of fish have died along one of the main rivers in Brazil's São Paulo state after an alleged illegal dumping of industrial waste from a sugar and ethanol plant. Environmental authorities and prosecutors said Wednesday that a preliminary analysis estimates that between 10 and 20 tons of fish died on the Piracicaba River in southeastern Brazil. The initial investigation points to an irregular discharge of wastewater from Esteva's São José plant in the community of Rio das Pedras, and it reached a stream that flows into the river, according to prosecutors.