Siglo XX mine

Siglo XX and other mines were placed under the control of a new state agency, the Corporación Minera de Bolivia (COMIBOL).

On 24 June 1967, government troops under the orders of President René Barrientos and a new military junta marched on the mine and committed the largest massacre of workers in Bolivian history.

[1] One witness and subsequent exile, Víctor Montoya, put the casualties at twenty killed and seventy wounded.

In 1987, as part of an economic restructuring deal with the IMF and World Bank, the government shut down production at Siglo XX.

Mining operations are currently undertaken by members of several large cooperatives who work independently or in small groups.