Brazilian rescuers were searching for some 200 missing people after a tailings dam burst on Friday at an iron ore mine owned by Vale SA, the second major dam disaster involving the company in just over three years.
Seven bodies had been recovered by nightfall, said Avimar de Melo Barcelos, the mayor of the town of Brumadinho where the dam burst in the mining-heavy state of Minas Gerais.
The toll was expected to rise sharply.