Former US President Barack Obamas and his extended family in Kenya are in mourning again after losing another matriarch barely a fortnight after burying world famous grandma Sarah Obama.

This follows the passing of Obama's step-mother Kezia Obama at the age of 81.

Kezia passed on on Tuesday April 14 at a hospital in the United Kingdom while she was receiving treatment for an unknown ailment.

PHOTO/COURTESY

She was Barack Obama Senior's first wife and the mother of Malik Obama, Auma Obama, Sadiq Obama and Mustafa Abo.

Auma Obama confirmed her mother's death in a tweet expressing how it had broken her heart: 

Said Obama, Malik's other brother said Kezia had been ailing over some time. 

Her death comes barely a month after the death of Mama Sarah Obama, Barack's grandmother.