Four men have been found guilty of trying to murder Rwanda’s former army chief, Gen Faustin Kayumba Nyamwasa, in South Africa in June 2010.
Another two suspects, including the alleged ringleader and the general’s former driver, were acquitted.
The magistrate said the shooting of Gen Nyamwasa was politically motivated.
The general had gone to live in exile in South Africa several months earlier after falling out with his former ally, Rwandan President Paul Kagame.
Rwanda has denied involvement in the shooting.
The sentences will handed down on 10 September.