UN human rights experts have called for prompt, thorough and impartial investigations into the recent collapse of a dam in Brazil, the second such incident involving the same company in three years. Dozens have been killed and hundreds left missing in a disaster involving Vale Mining. The experts said, ‘The tragedy demands accountability, and calls into question preventative measures taken after the Samarco mining disaster just over three years ago, when a catastrophic flood of mining waste killed 19 people and affected the lives of millions, including indigenous communities. We urge Brazil’s government to act decisively on its commitment to do everything in its power to prevent more such tragedies and to bring to justice those responsible for this disaster.’ They also had concerns around deregulatory efforts on environmental and social protection in Brazil over the recent years.