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. From Wikipedia
Luis García Terán testified in Congress that the agency lost contact with Es Satty in December 2014 after receiving no viable intelligence to predict the 2017 attacks.
