In 1990 the Rwandan Patriotic Front (RPF), a rebel group composed primarily of Tutsi refugees, invaded northern Rwanda; this began the Rwandan Civil War. Although neither side gained a decisive advantage in the war, by 1992 Habyarimana's authority had weakened; mass demonstrations forced him into a coalition with the domestic opposition and to sign the 1993 Arusha Accords with the RPF. The cease-fire ended on 6 April 1994, when Habyarimana's plane was shot down near Kigali Airport and he was killed. Habyarimana's death was the catalyst for the Rwandan genocide, which began a few hours later. In about 100 days, 500,000 to 1,000,000 Tutsi and politically-moderate Hutu were killed in well-planned attacks ordered by the interim government. The Tutsi RPF under Paul Kagame restarted their offensive and methodically regained Rwanda, controlling the whole country by mid-July. As of 2020 Kagame and the RPF remain in control, restoring growth in Rwanda's economy, its number of tourists and the country's Human Development Index.