A few years later, the prince allied with the emir of Sadjid, Yusuf, against Eastern Syunik, which they invaded together. Sembat was sheltered in the fortress of Erendchak (today Alindja, northeast of Nakhchivan) and Yusuf remained owner of Eastern Syunik. Sembat requested refuge from his brother-in-law Khatchik-Gagik, which was granted. In the same year (909), the prince of Western Syunik, Grigor Sufan II, submitted to the emir Yusuf in Dwin. Only Byzantine movements and the withdrawal of the Sadjids permitted him to recover the throne sometime later. Sembat, with his three brothers Sahak, Babgen, and Vasak, governed again. Also in Western Syunik, Sahak, Ashot and Vasak, brothers of Grigor-Sufan II, were governing the country. After them the dynasty of Western Syunik became extinct and the territory was subsumed by the Muslims.