Niger's President Mamadou Tandja was detained by mutinous troops on Thursday after a coup in the west African uranium exporter that left at least three soldiers dead, military sources said. Three Nigerian military sources said the coup was led by a soldier named Major Adamou Harouna. "The coup leader has succeeded. It is being led by Major Adamou Harouna," one source said. The president and the ministers are being detained not far from the presidential palace, the sources added. Earlier in the day plumes of smoke were seen rising from the palace after soldiers attacked the building where Tandja was...