Mass graves found in east Congo village after M23 rebel retreat, HRW says
DEMOCRATIC Republic of Congo's M23 rebels allegedly executed scores of villagers and militia members between November and April and buried their bodies in mass graves, Human Rights Watch (HRW) said, accusing Rwanda of backing the group. The Tutsi-led M23 staged a major offensive in Congo's restive east last year, triggering an armed response from local and regional forces. Hundreds of thousands have fled fighting near the borders with Rwanda and Uganda. Last year, the United Nations accused the group of executing at least 131 people in November in retaliation for clashes between M23 and rival armed groups. The U.N.'s human rights office…