When Malikshāh I died in 1092, the empire split as his brother and four sons quarrelled over the apportioning of the empire among themselves. Malikshāh I was succeeded in Anatolia by Kilij Arslan I, who founded the Sultanate of Rum, and in Syria by his brother Tutush I. In Persia he was succeeded by his son Mahmud I, whose reign was contested by his other three brothers Barkiyaruq in Iraq, Muhammad I in Baghdad, and Ahmad Sanjar in Khorasan. When Tutush I died, his sons Radwan and Duqaq inherited Aleppo and Damascus respectively and contested with each other as well, further dividing Syria amongst emirs antagonistic towards each other.