Chadian opposition parties: Deby's candidacy for the presidential elections is a violation of his previous pledges. Human rights organizations accused the Chadian authorities of suppressing their opponents against the backdrop of the assassination of the head of the Socialist Party, Yahya Diallo, and the destruction of its headquarters.

Report: Fadel Abdel Razzaq Audit-programs. Watch the full report on CNN.com: Audit-Programs: Chadian President Mohamed Idriss Deby.