sentences:  According to Piñol, the bomb used in Makilala had the "all the signatures of the MILF".Army bomb experts said that the bomb was detonated via a mobile phone and that twenty missed calls were logged when the phone was found.Others suggest the Abu Sayyaf or Jemaah Islamiyah (JI) was behind the attacks, as the arrest of Istiada Binti Oemar Sovie, the wife of JI leader Dulmatin, in Sulu may have prompted the attacks.