Hutu violence erupted again, culminating in the Rwandan Genocide of 1994, when Hutu extremists killed an estimated 800,000 Rwandans, mostly Tutsis. About 30% of the Twa pygmy population of Rwanda were also killed by the Hutus. At the same time, the Rwandan Patriotic Front took control of the country and is still the ruling party . Burundi is also currently governed by a former rebel group, the Hutu CNDD-FDD. As of 2006, violence between the Hutu and Tutsi had subsided, but the situation in both Rwanda and Burundi was still tense, and tens of thousands of Rwandans were still living outside
Hutu of Rwandan national unity, but has been criticized as an attempt at historical revisionism. Still others suggest that the two groups are related but not identical, and that differences between them were exacerbated by Europeans, or by a gradual, natural split, as those who owned cattle became known as Tutsi and those who did not became Hutu. Mahmood Mamdani states that the Belgian colonial power designated people as Tutsi or Hutu on the basis of cattle ownership, physical measurements and church records. There is an ongoing debate as to whether the Hutu and Tutsi are really separate groups or not;