<p>A 20-year-old Muslim convert dubbed "Jihadi Jack" has emerged as the first white British boy to join the dreaded Islamic State (ISIS) terror group in Syria.<br /><br /></p>.<p>Jack Letts travelled to Syria when he was 18 after converting to Islam and telling his parents he was going to study Arabic in Kuwait.<br /><br />A keen footballer and good student, admitted to his parents that he was with ISIS in Syria in September 2014.<br /><br />While Letts's parents, who live in the city of Oxford, declined to comment, a source close to the family told 'The Sunday Times': "His mother and father were extremely worried for his safety after he told them that he was in Syria. The past two years have been a real nightmare for them. They just wish he can be back home with them."<br /><br />His father, John, is an organic farmer and archaeobotanist who specialises in growing and milling heritage grains.<br /><br />His mother, Sally, is a former books editor.<br /><br />It is understood that Letts married a woman from the Iraqi city of Fallujah shortly after arriving in Syria.<br /><br />His decision to join ISIS has surprised former friends at Cherwell School, Oxford.<br /><br />"He was very funny and fun to be around," recalled one former school friend, who said Letts had now been nicknamed "Jihadi Jack" by some of his peers.<br /><br />"At school he was very much the classroom clown and was liked by a lot of the students. That's why this whole thing of him going to live in Syria and join ISIS doesn't make any sense," the friend told the newspaper.<br /><br />Letts is among more than 750 British men and women who have joined ISIS in Syria and Iraq.<br /><br />'The Sunday Times' said last week that up to 100 have been killed but there is no evidence that Letts has been involved in any fighting.<br /><br />Letts, who now reportedly uses the name Ibrahim, is believed to be living in Raqqa, the ISIS de facto capital in Syria and a target of US-led airstrikes. <br /></p>
<p>A 20-year-old Muslim convert dubbed "Jihadi Jack" has emerged as the first white British boy to join the dreaded Islamic State (ISIS) terror group in Syria.<br /><br /></p>.<p>Jack Letts travelled to Syria when he was 18 after converting to Islam and telling his parents he was going to study Arabic in Kuwait.<br /><br />A keen footballer and good student, admitted to his parents that he was with ISIS in Syria in September 2014.<br /><br />While Letts's parents, who live in the city of Oxford, declined to comment, a source close to the family told 'The Sunday Times': "His mother and father were extremely worried for his safety after he told them that he was in Syria. The past two years have been a real nightmare for them. They just wish he can be back home with them."<br /><br />His father, John, is an organic farmer and archaeobotanist who specialises in growing and milling heritage grains.<br /><br />His mother, Sally, is a former books editor.<br /><br />It is understood that Letts married a woman from the Iraqi city of Fallujah shortly after arriving in Syria.<br /><br />His decision to join ISIS has surprised former friends at Cherwell School, Oxford.<br /><br />"He was very funny and fun to be around," recalled one former school friend, who said Letts had now been nicknamed "Jihadi Jack" by some of his peers.<br /><br />"At school he was very much the classroom clown and was liked by a lot of the students. That's why this whole thing of him going to live in Syria and join ISIS doesn't make any sense," the friend told the newspaper.<br /><br />Letts is among more than 750 British men and women who have joined ISIS in Syria and Iraq.<br /><br />'The Sunday Times' said last week that up to 100 have been killed but there is no evidence that Letts has been involved in any fighting.<br /><br />Letts, who now reportedly uses the name Ibrahim, is believed to be living in Raqqa, the ISIS de facto capital in Syria and a target of US-led airstrikes. <br /></p>