The main opposition coalition boycotted the vote after a referendum allowed the removal of term limits.
The leaders of Guinea and the Central African Republic aim to consolidate power after Sunday's polls.
Dominique Désiré Erenon was arrested on arrival in Bangui after three years spent living in France.
Edouard Ngaïssona, along with Alfred Yekatom, was convicted of targeting CAR's Muslim population.
The explosion occurred at an electrical transformer near where students were taking final exams.
President Touadéra says it could "unite people" but many have lost money on similar investments.
Blouin ran in the same circles as liberation icons like Patrice Lumumba, Kwame Nkrumah and Sékou Touré.
The new monument "is part of the bilateral relationship" between CAR and Russia, officials say.
A shadowy operative appears to overstep his mark in the battle for Russian influence in Africa.
