Kigali remainder of the colonial era, as much of the administration took place in Ruanda-Urundi's capital Usumbura, now known as Bujumbura in Burundi. Usumbura's population exceeded 50,000 during the 1950s, and was the colony's only European-style city, while Kigali's population remained at around 6,000 until independence in 1962. Kigali become the capital upon Rwandan independence in 1962. The traditional capital was the seat of the "mwami" (Kings Yuhi V, Mutara III and Kigeli IV) in Nyanza, while the colonial seat of power was in Butare, then known as Astrida. Butare was initially the leading contender to be the capital of the
Kigali down near Kigali Airport. This was the catalyst for the Rwandan genocide, in which 500,000–1,000,000 Tutsi and politically moderate Hutu were killed in well-planned attacks on the orders of the interim government. Opposition politicians based in Kigali were killed on the first day of the genocide, and the city then became the setting for fierce fighting between the army (mostly Hutu) and the Tutsi-dominated Rwandan Patriotic Front (RPF). On 8 April, Rwandan government forces attacked the RPF base in the parliament building from several directions, but RPF troops successfully fought back. The RPF then began an attack from the north