▁P P ▁government ▁was ▁accused ▁of ▁f als ely ▁bl aming ▁E TA ▁for ▁the ▁attacks . ▁The ▁day ▁of ▁the ▁attacks , ▁police ▁officials ▁informed ▁the ▁Government ▁that ▁explos ives ▁usually ▁used ▁by ▁E TA ▁were ▁found ▁at ▁the ▁bl ast ▁sites . ▁This , ▁along ▁with ▁other ▁susp icious ▁circumstances , ▁led ▁the ▁P P ▁to ▁suspect ▁E TA ▁invol vement . ▁Although ▁there ▁was ▁no ▁direct ▁or ▁indirect ▁evidence ▁from ▁the ▁investigation ▁of ▁the ▁bomb ing ▁pointing ▁to ▁E TA ▁invol vement , ▁the ▁group ▁had ▁been ▁caught ▁with ▁a ▁large ▁amount ▁of ▁explos ives ▁some ▁months ▁previously , ▁which ▁looked ▁like ▁prepar ations ▁for ▁a ▁big ▁strike . ▁According ▁to ▁a ▁report ▁of ▁the ▁European ▁Str ateg ic ▁Int elligence ▁and ▁Security ▁Center ▁( ES IS C ), ▁the ▁same ▁morning ▁of ▁the ▁bomb ings ▁the ▁Spanish ▁Int elligence ▁Services ▁and ▁Policy ▁had ▁concluded ▁that ▁the ▁author ▁of ▁the ▁mass acre ▁was ▁an ▁Islam ist ▁terror ist ▁group , ▁but ▁they ▁had ▁been ▁ordered ▁by ▁the ▁government ▁to ▁den y ▁this ▁Islam ist ▁att ribution ▁and ▁ins ist ▁that ▁the ▁E TA ▁were ▁the ▁only ▁suspect s , ▁although ▁this ▁same ▁source ▁also ▁states ▁that ▁there ▁is ▁no ▁preced ent ▁of ▁collaboration ▁of ▁international ▁Islam ists ▁with ▁non - Mus lim s , ▁and ▁there ▁were ▁two ▁non - Mus lim s ▁( and ▁police ▁inform ers ) ▁involved ▁in ▁the ▁Madrid ▁attacks . ▁ ▁The ▁government ▁sent ▁messages ▁to ▁all ▁Spanish ▁emb ass ies ▁abroad ▁ordering ▁that ▁they