The Rwanda genocide explained in 90 seconds
6 April 2014 Last updated at 00:05 BST
Between April and June 1994, some 800,000 ethnic Tutsis and moderate Hutus were brutally slaughtered in Rwanda.
What led to such horrific events? And how has Rwanda dealt with the aftermath?
Twenty years on, BBC Africa's Kassim Kayira explains the events that shook Rwanda.
Video produced by Baya Cat