At least a thousand people gathered in a square in the centre Burkina Faso's capital on Sunday to protest against the army taking over after President Blaise Compaore's resignation, Reuters reported. A U.N. official on Sunday joined the United States and the African Union in rejecting the army's seizure of power but expressed cautious optimism about a return to civilian rule. "We are hoping for a transition led by civilians in line with the constitution," Mohammed Ibn Chambas, head of the United Nations Office for West Africa, said. "He (Zida) said he will reflect and try to work with the U.N., African Union and the Economic Community of West African States and to find an acceptable agreement which conforms to the constitution," he said.