Switched from nonviolent protest to armed struggle under apartheid, he was arrested in 1963 for sabotage and sent to Robben Island for 15 years. He was released in 1979.
Yakuwehob mu myigaragambyo idahwitse mu myigaragambyo  yitwaje ivanguramoko, yatawe muri yombi mu 1963 azira gusenya no koherezwa ku kirwa cya Robben imyaka 15. Yarekuwe mu 1979.