Ntaganda, the president of Rwanda’s Ideal Social Party, was convicted last year of endangering national security, inciting ethnic divisions and attempting to organise demonstrations without authorisation.
Ntaganda’s party was the only one of three new opposition parties that succeeded in registering ahead of Rwanda’s 2010 presidential elections.
Ntaganda had announced plans to run in those elections but he was arrested at dawn on the first day that presidential candidates could register and he has been detained ever since.
According to the indictment against him, Ntaganda made public statements criticising government policies and the special Gacaca courts created to try genocide suspects, saying that some judges ruled against people based on their ethnicity.
In those statements Ntaganda is alleged to have referred to Rwanda’s ruling RPF party using a controversial expression in Kinyarwanda which, roughly translated, means "Put down what you are carrying and share it, or we will destroy it."
Prosecutors said that statement was meant to incite violence against those in power.