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Rwanda is holding a week of official mourning to mark the 20th anniversary of the country's genocide.

On 6 April 1994, a plane carrying then-President Juvenal Habyarimana - a Hutu - was shot down, killing everyone on board. Hutu extremists blamed the Tutsi rebel group, the Rwandan Patriotic Front (RPF), and immediately started a well-organised campaign of slaughter.

The RPF said the plane had been shot down by Hutus to provide an excuse for the genocide.

Between April and June, an estimated 800,000 people - mostly ethnic Tutsis and moderate Hutus - died at the hands of Hutu extremists.

Liliane Umubyeyi, who is now 35 and moved to Britain in 2000, witnessed her family being slaughtered by armed Hutus and was gang-raped, but survived.

She is now a trustee of the which supports survivors of the Rwandan genocide.

This Newsnight animation tells her story.

Interview by Ryan Dilley, animation by Aslan Livingstone-Ra