The brother of Jihadi John was a member of a group dubbed the 'Muslim mafia ' in school and admired a controversial Islamic hate preacher , it has been claimed , as the first photographs of Omar Emwazi emerge . The 21-year-old - whose older brother Mohammed was exposed as the infamous ISIS killer last week - is said to have supported Sheikh Khalid Yasin , who was lauded by Lee Rigby killer Michael Adebowale . Omar had lived with Mohammed , 26 , and both went to school together at Quintin Kynaston Academy in north west London , which was also attended by another ISIS member , Choukri Ellekhlifi . Omar Emwazi , 21 , was reportedly part of a so-called Muslim mafia in school and looked up to a controversial hate preacher . He is the younger brother of Mohammed Emwazi , revealed last week as the face behind Jihadi John 's mask . Omar is said to have quickly taken down his Facebook page after his brother 's new identity was revealed last week . He reportedly used the site to 'like ' Sheikh Yasin , a preacher who has called the Taliban his 'brothers ' and denounced both Christian and Jewish beliefs as 'filth ' . Yasin has also claimed that the Koran gives men permission to 'beat women lightly ' and has called homosexuality an 'aberration ' that should be 'punishable by death ' . Michael Adebowale - who was jailed last year for the murder of Fusilier Lee Rigby - said Yasin 's views taught him the 'purpose of life ' and convinced him to convert to Islam . Omar is believed to be being questioned in Kuwait , the home country of his father , Jassem , over Mohammed 's involvement with ISIS , after they recently returned to the country from their house in west London . A schoolfriend of Omar has said he was part of a group dubbed 'the Muslim Mafia ' at Quintin Kynaston because of their devout religious views . The unnamed woman told Victoria Ward of The Daily Telegraph : 'He was very religious but in an unobtrusive way . 'In every year there was a set that was the Muslim Mafia that hung out together and were very religious . ' The former schoolfriend insisted Omar was too much of a 'wimp ' to be an extremist . Mohammed Emwazi was this week revealed to be ISIS killer 'Jihadi John ' , seen beheading hostages in videos . He and his younger brother Omar Emwazi both went to Quintin Kynaston Academy in north London . A school friend has said the younger boy was part of a religious clique known as 'the Muslim Mafia ' Omar Emwazi is said to have used Facebook to profess his admiration for Muslim hate preacher Sheikh Kalid Yasin ( left ) , who inspired Lee Rigby killer Michael Adebowale ( right ) to convert to Islam . The Emwazi family have left their home in north London , which was visited by authorities investigating Mohammed last week . Omar is also said to have been a member of a group called Power of Dawah , who try to convert people to Islam in the street . Quintin Kynaston - which has a large number of Muslim students - is set to undergo a review over how it handled radicalisation among its pupils . The school , which is said to be completely different today from the time when the Emwazis attended , will be investigated by the Department of Education . Its former the former headteacher , Jo Shuter , today insisted staff new nothing of any extreme influence of students . She told Radio 4 's Today programme : ' I 'm not prepared to say when the radicalisation took place but all I can say is hand on heart that we had no knowledge of it . 'There was never any sense that any of these young men , as I knew them , were ever radicalised at the school . ' The Emwazi 's father was a member of the 'Bidoun ' group of stateless people denied citizenship by countries in the Gulf . He worked as a police officer in Kuwait , where Mohammed was born , until he found his loyalties questioned after Saddam Hussein 's 1990-1 invasion of the Gulf State because his family was originally from Iraq . Mr Emwazi took his wife and his children to live in London in 1993 , although he later returned and is now living in the Kuwaiti city of Jahra . The family are now in Kuwait , where they are reportedly being questioned by the security services .
Brother Omar went to same London school as infamous ISIS killer . He was said to be part of a tight group of deeply-religious schoolboys . Score: 6