1. Mauritanian oral tradition claims Abu Bakr was killed in a clash with the "Gangara" (Soninke Wangara of the Tagant Region of southern Mauritania), relating that he was struck down by an arrow from an old, blind Gangara chieftain in the pass of Khma (between the Tagant and Assab mountains, en route to Ghana).[2][3] According to Wolof oral tradition, a Serer bowman named Amar Godomat killed him with his bow near lake Rzik (just north of the Senegal) (Godomat's name apparently originates with this death).[4] It goes on to note that Abu Bakr left a pregnant Fula wife, Fâtimata Sal, who gave birth to a son, the legendary Amadou Boubakar ibn Omar, better known as Ndiadiane Ndiaye, who went on to found the Wolof kingdom of Waalo in the lower Senegal river.[5]
And 
@KidStranglehold has already illustrated that Berbers are majority East African descent, I don't care what "they look like."
2. The 
Bafour or 
Bafur may have inhabited present-day 
Mauritania and the 
Western Sahara before the arrival of Islamic peoples.
[1] Some sources say this is a loose term to encompass the pre-
Sahadja peoples, 
who were "part Berber, part Negro [sub-Saharan African], and part Semite."
[2] Others say they occupied these territories in the 15th century and, before the end of the 17th century, were assimilated by other tribes, including the 
Wolof, 
Berber and 
Fula.
3. The Haratines are more indigenous to NA and surely Africa than the Slavic and Middle Eastern people you are trying to tout