Abdelbaki Es Satty was a Moroccan imam in Ripoll, Spain. On 21 August, he was confirmed to have died in an accidental explosion in Alcanar on 16 August, which began the 2017 Barcelona attacks. Satty is believed to have been the mastermind of the planned attacks and to have radicalised the twelve terrorists responsible into the Takfir wal-Hijra sect, which allows adherents to copy typically "Western" behaviour often forbidden in Islam in order to conceal their radicalisation and terror plans. However, he was also serving as an informant to Spain's intelligence agency, CNI.