sentences:  In 1964, after receiving independence from the British colonial rule, there were widespread communal violence in the ethnically diverse state of Zanzibar.The violent groups were Arabs and Africans, that expanded along religious lines, and the communal violence ultimately led to the overthrow of the Sultan of Zanzibar.Local radio announced the death of tens of thousands of "stooges", but later estimates for deaths from Zanzibar communal violence have varied from hundreds to 2,000-4,000 to as many as 20,000.