The U.N. Security Council voted unanimously Monday to extend the mandate of the U.N. peacekeeping force in Mali for a year and called for a long-term and detailed plan for it to hand over security responsibilities and leave the West African nation. The resolution adopted by the 15-member council said the priority of the peacekeeping mission remains to support implementation of Mali’s 2015 peace agreement signed by three parties — the government, a coalition of groups called the Coordination of Movements of Azawad that includes ethnic Arabs and Tuaregs who seek autonomy in northern Mali, and a pro-government militia known as the Platform.