 Meanwhile , the Seljuks were advancing towards al @-@ Jazira , and the descendants of Qatada ibn Idris fought with their Ayyubid overlords over control of Mecca . The conflict between them was taken advantage of by the <unk> of Yemen who attempted to end Ayyubid suzerainty in the Hejaz and bring the region under their control which they accomplished in 1238 when Nur al @-@ Din Umar captured Mecca . 
