▁prop elled ▁by ▁the ▁bl ast ▁through ▁the ▁doors ▁to ▁the ▁ar ena , ▁possibly ▁indicating ▁that ▁the ▁explos ive ▁charge ▁was ▁held ▁in ▁the ▁back pack ▁and ▁ble w ▁him ▁forward ▁on ▁det on ation . ▁A ▁small ▁device ▁thought ▁to ▁have ▁possibly ▁been ▁a ▁hand - h eld ▁det on ator ▁was ▁also ▁found . ▁US ▁Congress man ▁Michael ▁McC a ul , ▁chairman ▁of ▁the ▁House ▁Hom eland ▁Security ▁Committee , ▁indicated ▁that ▁the ▁bomb ▁contained ▁the ▁explos ive ▁T AT P , ▁which ▁has ▁been ▁used ▁in ▁previous ▁bomb ings . ▁According ▁to ▁Manchester ▁police , ▁the ▁explos ive ▁device ▁used ▁by ▁Ab edi ▁was ▁the ▁design ▁of ▁a ▁sk illed ▁bomb - maker ▁and ▁had ▁a ▁back - up ▁means ▁of ▁det on ation . ▁Police ▁also ▁said ▁Sal man ▁Ab edi ▁" b ought ▁most ▁of ▁Manchester ▁bomb ▁components ▁himself " ▁and ▁that ▁he ▁was ▁alone ▁during ▁much ▁of ▁the ▁time ▁before ▁carrying ▁out ▁the ▁Manchester ▁bomb ing . ▁ ▁On ▁ 2 8 ▁May , ▁police ▁released ▁images ▁showing ▁Ab edi ▁on ▁the ▁night ▁of ▁the ▁bomb ing , ▁taken ▁from ▁C CT V ▁foot age . ▁Further ▁images ▁showed ▁Ab edi ▁walking ▁around ▁Manchester ▁with ▁a ▁blue ▁suit case . ▁ ▁According ▁to ▁US ▁intelligence ▁sources , ▁Ab edi ▁was ▁identified ▁by ▁the ▁bank ▁card ▁that ▁he ▁had ▁with ▁him ▁and ▁the ▁identification ▁confirmed ▁using ▁fa cial ▁recognition ▁technology . ▁ ▁A ▁total ▁of ▁ 2 2 ▁people ▁were ▁arrested ▁in ▁connection ▁with ▁the ▁attack