The Nelson Mandela Foundation announced his death.
As opposition to apartheid shifted toward violence in the early 1960s, beginning with sabotage and progressing to guerrilla war, Mr. Goldreich became a leading planner. He traveled to China, the Soviet Union and East Germany seeking military aid and information on making weapons. He wrote a detailed plan for the overthrow of the South African state and a disciplinary code for guerrillas. He identified possible industrial targets for sabotage.
