The Islamic State militant known as 'Jihadi John' has been named as a young British man who was known to intelligence services.
The man who has appeared in several IS beheading videos is understood to be Mohammed Emwazi, a Kuwait-born Briton from west London.
He's thought to be in his mid-20s and to have traveled to Syria around 2012 and later joined the Islamic State.
Asim Qureshi from activist group CAGE, which campaigns against the war on terror and had contact with Emwazi before he left for Syria, accused UK security services of radicalising him through harrassment.
Mr Qureshi became emotional as he spoke of the young man he had been in contact with before he traveled to Syria.
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