Hutu Rwanda, this led to the "Social revolution" and Hutu violence against Tutsis. Tens of thousands of Tutsis were killed and many others fled to neighboring countries, such as Burundi, Uganda and expanding the Banyamulenge Tutsi ethnic group in the South Kivu region of the Belgian Congo. Later, exiled Tutsis from Burundi invaded Rwanda, prompting Rwanda to close its border with Burundi. In Burundi, a campaign of genocide was conducted against Hutu population in 1972, and an estimated 100,000 Hutus died. In 1993, Burundi's first democratically elected president, Melchior Ndadaye, who was Hutu, was believed to be assassinated by Tutsi officers,
Hutu Power Front (RPF) invasion, Habyarimana turned to inflaming ethnic tensions. Hutu Power acquired a variety of spokesmen. Hassan Ngeze, an entrepreneur recruited by the government to combat the Tutsi publication "Kanguka", created and edited "Kangura", a radical Hutu Power newsletter. He published the "Hutu Ten Commandments", which included the following: "Radio Télévision Libre des Mille Collines" broadcast radio shows suggesting the end to toleration of the Tutsi, repeating the Hutu Ten Commandments, and building support for the Hutu Power ideology. Two main voices of RTLM were announcers Valérie Bemeriki and Georges Ruggiu. The repetition of Hutu Ten Commandments was an attempt