A group of opposition leaders in Chad have denounced the April 10th elections outcome that saw President Idriss Deby win a fifth term in office.
Eight opposition leaders including Kebzabo who had alleged ballot-stuffing and trafficking in voter cards said after meeting in the capital that they did not recognize the results issued by the electoral body.
The group claimed that hundreds of ballot boxes have disappeared.
During the polls there was a communications blackout with internet cut and mobile phones unable to send messages.
Earlier this month, four civil society leaders were handed four-month suspended sentences for urging anti-government protests ahead of the vote.
More than six million people voted to choose between 13 presidential hopefuls in the polls, with turnout pegged at more than 71 percent.
African Union observers last week declared the elections free and fair allowing Deby to extend his 25-year rule.