(S (S (BASENP (DT The) (NNS officials)) (VP (VP (VBD claimed) (SBAR (IN that) (S (BASENP (JJ such) (JJ sophisticated) (NNS weaponry)) (VP (VP (MD could) (RB not)) (VP (VB have) (VP (VBN been) (VP (VBN assembled) (PP (IN by) (BASENP (DT the) (JJ Shia) (NN militia)))))))))) (CC and) (VP (VBD said) (SBAR (IN that) (S (BASENP (PRP it)) (VP (MD must) (VP (VB have) (VP (VBN been) (VP (VBN supplied) (PP (IN from) (BASENP (JJ neighbouring) (NNP Iran)))))))))))) (PERIOD .))