Alp Arslan
Two years before, the Seljuk sultan Mahmud II had named his cadet son Alp-Arslan as overlord of Zengi, but the latter had neutralized him and carried with him at the siege. At Zengi's death, Alp-Arslan tried to exploit the ensuing disorder to gain the power in Mosul. Two of Zengi's advisors, the head of the diwan al-Din Muhammad Jemal and "hajab " Amir Salah al-Din Muhammad al-Yaghisiyani took the side of Saif ad-Din: taking advantage of the inexperience of the young Seljuk, giving Saif ad-Din the time necessary to take control of Mosul. When Alp Arslan appeared in Mosul, he was arrested and imprisoned in the citadel.