Mustafa Paşa feuded with "agha" Muhammad Aghayê Sor, and in 1900 the "kaymakam" of Jazirat Ibn ʿUmar intervened to aid the Tayan clan, Mustafa Paşa's allies, against Aghayê Sor. Several months later, Mustafa Paşa had twenty villages in the district loyal to his rival destroyed, and Aghayê Sor wrote to the Brigadier General Bahaeddin Paşa seeking protection. Bahaeddin Paşa travelled to Jazirat Ibn ʿUmar to conduct an inquiry, but was imprisoned there for five days by Mustafa Paşa, and the two rivals continued to attack each other's territories until Mustafa Paşa was assassinated on Aghayê Sor's orders in 1902. Within the "kaza" of Jazirat Ibn ʿUmar, in 1909, there were 1500 households, 1000 of which possessed over 50 dönüms. As late as 1910, the Miran clan annually migrated from their winter pastures in the plain of Mosul to Jazirat Ibn ʿUmar in the spring to trade and pay taxes, and then across the Tigris to summer grazing grounds at the source of the river Botan. The British scholar Gertrude Bell visited the city in May 1910.