Freedom of expression in Mauritania has come under the spotlight in recent years
Protest leaders had reached agreement with the ruling military council on the other main aspects of the transition.
President Mutharika faces his deputy Saulos Chilima and former ruling party's Lazarus Chikwera
Incumbent president, Mutharika faces opposition from his own VP Saulos Chilima and former baptist preacher, Lazarus Chakwera.
Both Zuma and Thales deny any wrongdoing and have applied to the court for a permanent stay of prosecution.
The military council is still insisting that the president of the sovereign council should be from the military
Katumbi has also been an opponent of Tshisekedi, who took power after a disputed presidential poll.
Zuma is accused of taking bribes from French defence company, Thales during his time as a provincial economy minister.