In 656, Caliph Uthman, the third caliph to rule after the death of the Prophet, was assassinated at his home in Medina (now Saudi Arabia) by besieging Muslim rebels from Mesopotamia.
CNN: Wednesday,
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The new sultan will be chosen from Sokoto's ruling dynasty - descendents of Uthman Dan Fodio, who launched a jihad, or holy war, in 1804, spreading Islam across northern Nigeria and its neighbours.
BBC: The Sultan of Sokoto Mohammadu Maccido
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In this letter bin Laden mentioned by name a number of his children living in Iran including his sons Ladin, Uthman and Muhammad and his daughter Fatima, who is married to Sulaiman Abu Ghaith who now sits in a Manhattan jail.