Leading British imams and clerics have released a video rejecting the Islamic State's ideology following the apparent beheading of American journalist James Foley.
The film, posted on YouTube, aims to "tackle the ISIS ideology of barbarism, persecuting minorities, brutal murder and enslavement of women."
"It's extremely horrifying terribly upsetting to see that beheading, killing and persecution of people is taking place in the name of Islam," Imam Qari Asim says during the video.
Barking Masjid secretary Ustadh Ashfaq Sadiq adds, "This is not what Muslims stand for, it is not what I stand for as a Muslim."
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.