Pictures: Sarah Obama at her home in K'Ogelo (Kenya) with the Kigali Marathon Timekeeping Team (May 2013)
Barack Obama's step-grandmother, Sarah Obama, has died at a hospital in Kenya at the age of 99.
Affectionately called Granny Sarah by the former president, Mrs Obama defended her grandson during his 2008 presidential campaign, when he was said to be Muslim and not born in the US.
Her home became a tourist attraction when he was elected as the first black US president.
Sarah Obama was the third and youngest wife of Barack Obama's grandfather.
She died early on Monday at a hospital in the western town of Kisumu. A family spokesman said Mrs Obama had been unwell for a week.