Origins of Hutu, Tutsi and Twa of neighboring people, it was almost non-existent among Rwandan Tutsi. Presence of the sickle cell trait is evidence of survival in the presence of malaria over many centuries, suggesting differing origins. Regional studies of the ability to digest lactose are also supportive. The ability to digest lactose among adults is widespread only among desert-dwelling nomadic groups that have depended upon milk for millennia. Three quarters of the adult Tutsi of Rwanda and Burundi have a high ability to digest lactose, while only 5% of the adults of the neighboring Shi people of eastern Congo can. Among Hutu, one in three
Kangura 1993 issue stated that a Hutu soldier angry over the Arusha agreement would soon assassinate the president. The January 1994 issue predicted that Habyarimana would be killed in March. "Kangura" had stopped publishing by 6 April 1994, when the plane carrying Presidents Habyarimana and Cyprien Ntaryamira of Burundi was shot down over Kigali. This sparked the genocide. Over 800,000 people were killed, mostly Tutsis but including Hutu moderates and Hutus who attempted to protect Tutsi from the militias. Hassan Ngeze, the founder, editor and accountant for "Kangura" fled the country as the RPF took control. He was arrested in 1997