CONAKRY—The soldiers who seized power in Guinea over the weekend have consolidated their takeover with the installation of military provincial governors, Guinean media reported on Tuesday. West African leaders have threatened sanctions over the overthrow of President Alpha Conde, who was serving a controversial third term after first winning election in 2010, and will meet to discuss the situation on Thursday. Coup leader Mamady Doumbouya, a former officer in the French Foreign Legion, has promised a transitional government of national unity and a “new era for governance and economic development”. But he has not yet explained exactly what this will entail, or given a timeframe. Sunday’s uprising, in which Conde and other top politicians were detained or barred from traveling, is the third since April in West and Central Africa. The governor of Guinea’s easterly Kankan province, Sadou Keita, called his replacement on Monday by a general a moment of …