▁a ▁fail ings ▁in ▁the ▁handling ▁of ▁Sal man ▁Ab edi ' s ▁case . ▁While ▁it ▁is ▁impossible ▁to ▁say ▁whether ▁these ▁would ▁have ▁prevent ed ▁the ▁dev ast ating ▁attack ▁on ▁ 2 2 ▁May , ▁we ▁have ▁concluded ▁that ▁as ▁a ▁result ▁of ▁the ▁fail ings , ▁potential ▁opportun ities ▁to ▁prevent ▁it ▁were ▁missed ." ▁ ▁Investig ation ▁ ▁The ▁property ▁in ▁F allow field ▁where ▁Ab edi ▁lived ▁was ▁ra ided ▁on ▁ 2 3 ▁May . ▁Ar med ▁police ▁bre ached ▁the ▁house ▁with ▁a ▁controlled ▁explos ion ▁and ▁searched ▁it . ▁Ab edi ' s ▁ 2 3 - year - old ▁brother ▁was ▁arrested ▁in ▁Chor l ton - c um - H ard y ▁in ▁south ▁Manchester ▁in ▁relation ▁to ▁the ▁attack . ▁Police ▁carried ▁out ▁ra ids ▁in ▁two ▁other ▁areas ▁of ▁south ▁Manchester ▁and ▁another ▁address ▁in ▁the ▁Wh al ley ▁Range ▁area . ▁Three ▁other ▁men ▁were ▁arrested , ▁and ▁police ▁initially ▁spoke ▁of ▁a ▁network ▁supporting ▁the ▁bom ber ; ▁they ▁later ▁announced ▁that ▁Ab edi ▁had ▁s our ced ▁all ▁the ▁bomb ▁components ▁himself , ▁and ▁that ▁they ▁now ▁believed ▁he ▁had ▁largely ▁acted ▁alone . ▁On ▁ 6 ▁July , ▁police ▁said ▁that ▁they ▁believed ▁others ▁had ▁been ▁aware ▁of ▁Ab edi ' s ▁plans . ▁ ▁According ▁to ▁German ▁police ▁sources , ▁Ab edi ▁trans ited ▁through ▁Düsseldorf ▁Airport ▁on ▁his ▁way ▁home ▁to ▁Manchester ▁from ▁Ist an bul ▁four ▁days ▁before ▁the ▁bomb ing . ▁French