Pluspetrol...was forced to shut down part of one of its natural gas lots...after Peruvian tribes invaded it over a dispute over land…Indigenous rights group AIDESEP said tribes seized drilling platforms, a helicopter port and buildings in southern Peru. It also said tribes took over an electricity station and closed part of an oil duct in northern Peru. They said the protests were to demand meetings with the government over land rights."We are not against development ... but first our rights must be respected," said...the president of AIDESEP. Peru's government has encouraged oil and gas drilling nationwide, angering indigenous and environmental groups.