Gabon’s opposition candidate Albert Ondo Ossa, who was the main challenger of deposed President Ali Gombo during the Aug. 26 election, alleged that Gombo's family was behind a plot to keep them in power after more than five decades of rule over the oil-rich central African nation. “It's a palace revolution, so there's no military coup. The proof is that it was the praetorian guard who carried out the palace revolution. The other soldiers were not involved. So, it's a palace revolution,” said Ondo Ossa late Thursday in an interview with French media outlet TV5 Monde.