The Sharpeville Massacre occurred on 21 March 1960, at the police station in the South African township of Sharpeville in the Transvaal Province (now called Gauteng). After a day of demonstrations, at which a crowd of black protesters far outnumbered the police, the South African police opened fire on the crowd, killing 69 people. Some sources state that the crowd were peaceful. Other sources state that the crowd had been hurling stones at the police, injuring several police officers, and that the shooting only started when the crowd started advancing toward the fence around the police station.
For more information visit Wikipedia.