A few years later, the prince allee'd wi the emir o Sadjid, Yusuf, against Eastren Syunik, which thay invadit thegither. Sembat wis sheltered in the fortress o Erendchak (the day Alindja, northeast o Nakhchivan) an Yusuf remained awner o Eastren Syunik. Sembat requestit refuge frae his brither-in-law Khatchik-Gagik, which wis grantit. In the same year (909), the prince o Wastren Syunik, Grigor Sufan II, submittit ae the emir Yusuf in Dvin. Anerlie Byzantine muivements an the athdrawal o the Sadjids permittit him tae recover the throne some time later. Sembat, wi his three brithers Sahak, Babgen, an Vasak, govrened again. An aw in Wastren Syunik, Sahak, Ashot an Vasak, brithers o Grigor-Sufan II, wur govrenin the kintra. Efter them the dynasty o Wastren Syunik became extinct an the territory wis subsumit bi the Muslims.