The US Government believed they had "sufficient intelligence" to carry out an operation in Syria, in an attempt rescue hostages, according to a federal prosecutor.
Lisa Monaco was cited by Pentagon spokeswoman Marie Harf that President Obama had authorised the operation.
Lisa Monaco: USG had what we believed was sufficient intelligence; when the opportunity presented itself, the President authorized operation
Monaco: President could not be prouder of US forces who carried out this mission & intel & diplo professionals who supported their efforts.
A British family have told ITV News of their devastation after discovering a close relative is fighting with the Islamic State in Iraq.
A French journalist who was held hostage with James Foley in Syria has told ITV News it was "devastating" to see his murder.