The most powerful of the Central African Republic's armed groups said in a statement on Monday it would quit a rebel coalition aiming to unseat President Faustin Archange Touadera. The Union for Peace in Central Africa (UPC), mainly active in the country's east, "commits to withdraw from the Coalition of Patriots for Change" (CPC), the group's head Ali Darassa wrote, saying the "population is suffering bitterly from lack of security, the health situation, famine and lack of humanitarian assistance". clt/dyg/tgb/jxb