Those IDPs who were forced to leave the camps were subject to attacks by crowds seeking vengeance for family killed during the genocide, as well as dehydration and exhaustion. On April 24, the IOC announced that 145,228 IDPs had returned to Butare Prefecture from the camps, and two days later revised this figure down to 60,177. Prunier, attempting to make sense of these numbers, notes that if a low estimate of the pre-crisis Kibeho population (about 80,000) is taken as correct, this still means that at least 20,000 people "vanished." From this, Prunier concludes that it is likely that 20,000 to 30,000 former residents of Kibeho died after the massacre as a result of being expelled from the comparative safety of the camps.