itan um , ▁he ▁was ▁entr usted ▁with ▁leading ▁an ▁expedition ▁against ▁the ▁Em ir ate ▁of ▁Cre te , ▁but ▁all ▁other ▁sources ▁record ▁that ▁The ok t ist os ▁led ▁the ▁campaign . ▁It ▁is ▁possible , ▁however , ▁that ▁Ser g ios ▁was ▁left ▁behind ▁when ▁The ok t ist os ▁was ▁forced ▁to ▁hurried ly ▁return ▁to ▁Constantin ople . ▁Ser g ios ▁died ▁on ▁Cre te , ▁where ▁the ▁By z antine ▁forces ▁were ▁defeated ▁by ▁the ▁Arab s , ▁and ▁was ▁initially ▁buried ▁on ▁the ▁island ▁in ▁a ▁monaster y ▁that ▁became ▁known ▁after ▁him ▁as ▁tou ▁Mag istr ou ▁(" of ▁the ▁mag ist ros "). ▁He ▁was ▁later ▁moved ▁to ▁a ▁Mon aster y ▁of ▁the ▁The ot ok os ▁in ▁the ▁G ulf ▁of ▁Nic om edia , ▁which ▁he ▁had ▁founded ▁and ▁which ▁in ▁turn ▁became ▁known ▁as ▁tou ▁Nik et iat ou ▁there after . ▁ ▁The ▁French ▁By z antin ist ▁Henri ▁Gr é go ire ▁suggested ▁that ▁Nik eti ates ▁is ▁to ▁be ▁identified ▁with ▁" I bn ▁Q at una ", ▁the ▁adm iral ▁recorded ▁in ▁Arab ic ▁sources ▁as ▁having ▁led ▁the ▁By z ant ines ▁in ▁their ▁s ack ▁of ▁Dam iet ta ▁in ▁ 8 5 3 , ▁but ▁although ▁this ▁hypothesis ▁was ▁taken ▁up ▁by ▁some ▁( not ably ▁Alexander ▁Vas il iev ), ▁it ▁is ▁rejected ▁by ▁modern ▁sch ol ars . ▁Gr é go ire ▁also ▁hypoth es ized ▁that ▁Ser g ios