The main coalition of opposition parties, the Coordination of Political Parties for Defence of the Constitution (CPDC), had previously suspended talks with the government following the February 2008 battle of N'Djamena, during which three opposition leaders (including CPDC spokesman Ibni Oumar Mahamat Saleh) had been arrested. Following the appointment of Abbas, the CPDC agreed to join the government in a meeting with Abbas on April 19, although some in the coalition, including Ibni Oumar Mahamat Saleh's Party for Liberties and Development (PLD), disagreed with this decision. They wanted Abbas to disclose what had happened to Saleh (who was still missing) in exchange for their participation in the government.