A Catholic nun has been sentenced to 30 years in prison for her role in the Rwandan genocide. Theophister Muka-Ki-Bibi was jailed by a traditional Rwandan court for helping Hutu militiamen kill Tutsis hiding in a hospital where she worked. It is believed that about 800,000 Tutsis and moderate Hutus were killed in the 1994 genocide. The gacaca courts are intended to speed up the genocide trials and are separate from Rwanda's conventional judicial system and an international genocide court. With nine judges from the local community, the traditional courts can impose life sentences. A UN tribunal based in neighbouring Tanzania is trying those accused of masterminding the genocide. Some 63,000 genocide suspects are currently being detained in Rwanda.