A former rebel leader in northern Mali was killed in the capital Bamako on Tuesday, according to the spokesman for a militia alliance in the region. Sidi Brahim Ould Sidati was the rotating president of the Coordination of Azawad Movements (CMA), a mostly Tuareg alliance that rose up against the central government in 2012. The report by spokesman Almou Ag Mohamed on social media was confirmed by a doctor and a close associate of Ould Sidati. The reason for the killing in the poor Sahel country was not immediately clear. The CMA brought together Tuareg and nationalist Arab groups -- including a faction led by Ould Sidati -- fighting Mali forces in the north until they signed a peace accord in 2015. The accord, seen as crucial to ending Mali's grinding conflict, has yet to be fully implemented in the former French colony. sd-ah-lal/gd/mjs