Inauguration of Mahamat Idriss Deby follows disputed election and marks an end to three years of military rule.
Military government chief’s victory in presidential polls prompts Succes Masra to resign from transitional post.
Deby’s win prolongs the rule of the family that has had a firm grip on power for decades.
Violence and questions of election-rigging, however, marred the vote tally, which was announced earlier than expected.