 This was interrupted by a short siege of Shayzar by the Burid ruler of Damascus, Shams al-Mulk Isma'il, in 1133 and a greater crisis by the Byzantine–Crusader siege of Shayzar in 1138 led by 
John II Komnenos.The Byzantine-led army initially attacked the Banu Munqidh-held forts of Kafartab and Hisn al-Jisr, causing their inhabitants to flee, before proceeding in their assault against Shayzar.Arabic and Greek sources both indicate that the Banu Munqidh and the people of Shayzar resisted the siege and the Byzantines' catapults for several days before John II's army withdrew.