A skull and body parts of an unknown person killed by suspected members of an armed group and buried are displayed after they were recovered from a mass grave in Mutakura, north of Burundi's capital Bujumbura, February 29, 2016. Three bodies were recovered from the grave, which was suspected to hold the remains of up to 30 bodies, police said. The mass grave was identified by a member of the armed rebel group operating in Mutakura after he surrendered to the national intelligence services. REUTERS/Evrard Ngendakumana