This is the latest young woman to flee the UK in a bid to reach the terrorist group Islamic State . Photographed in a police cell , the 21-year-old jihadi suspect named by officials as Jaila Nadra H was arrested by Turkish security services as she waited to board a bus in Ankara . They believe the Muslim convert from East London was attempting to travel to the lawless and often porous border with Syria . Scroll down for video . Turkish authorities are holding a 21-year-old British woman named by officials as Jaila Nadra H ( pictured ) on suspicion of trying to travel to Syria and into Islamic State territory to join the terror group . The woman faces being deported back to the UK where she is likely to be arrested on suspicion of preparing acts of terrorism . Sky News reports she is being held pending deportation hearings . One official said she was expected to be deported 'soon ' . Last night her family expressed shock at her arrest . A cousin told the Daily Mail : 'She converted to Islam several years ago and we hear little from her . 'Her father has recently come out of hospital where he was undergoing chemotherapy . It is hard to believe this could happen . ' Turkish officials said authorities apprehended the woman based on local intelligence and were not tipped off by British authorities . The woman was detained in Turkey trying to cross into Syria ( pictured ) , a known route for would-be jihadis . They said messages and images on her mobile phone indicated she was planning to head to Islamic State territory . The two officials spoke on condition of anonymity because of government rules against speaking to the media without prior authorization . A UK Foreign Office spokeswoman said : 'We can confirm the detention of a British national in Ankara and are providing consular assistance . ' The arrest comes days after three British teenagers were arrested at the airport in the Turkish city of Istanbul and thrown out of the country . The young men , two aged 17 and a third aged 19 , were questioned by counter-terrorism police on their return to the UK and released on bail . They have told their families they wanted to go to Syria to 'help ' , and denied subscribing to the beliefs of militant Islamists . This is the moment two 'naive and impressionable ' teenage cousins who dreamed of careers in medicine and engineering were stopped in Turkey by immigration officers at border control as they tried to flee to join ISIS on Saturday . Exodus : Amira Abase ( left ) , 15 , and Kadiza Sultana ( right ) , 16 , also travelled to Istanbul from UK on February 17 before reportedly entering Syria - where they could now be under the control of deadly female insurgents . Last month three British girls – Shamima Begum , 15 , Kadiza Sultana , 16 , and Amira Abase , 15 – travelled to Turkey . They were following in the footsteps of a fourth girl from their school , a close friend , who travelled to Syria last December . There are increasing concerns about the growing numbers of young people being lured to the warzone in Syria and Iraq . Last week David Cameron said everyone has a responsibility to examine why people should want to join Islamic State . Turkey is an important ally to the West as European states attempt to stem the flow of foreign fighters bolstering the ranks of Islamic State . It has been criticised for allowing fighters to cross the border into Syria but in return has asked why other countries allow militants to travel in the first place . Yesterday a High Court judge took the unprecedented step of making a 16-year-old boy a ward of court in a bid to stop him travelling to Syria . The boy , who can not be named because of a gagging order imposed by the court , is a member of a family steeped in militant Islam . He has dual Libyan and British citizenship . Two older brothers have been killed fighting in Syria and a third continues to fight despite being injured . An uncle was held in Guantanamo Bay . Mr Justice Hayden said he was concerned to 'keep this lad alive ' and said an order which barred from travelling abroad was proportionate . He said he was a vulnerable young person who had grown up in a family 'where the male members are patently committed to waging jihad in war-torn Syria ' . The decision was made in the Family Division of the High Court after an application by social services at Brighton and Hove City Council . Life of terror : 15-year-old Shamima Begum ( pictured ) - one of three British teenagers who is now believed to be inside Syria - contacted Aqsa Mahmood who is considered to be one of the leaders of brutal all-woman militant group al-Khansa .
Turkish authorities have detained British teenagers attempting to flee Syria . The 21-year - old was detained at a bus stop in Ankara , Turkey 's capital . Officials holding cellphone records showed she was planning to join ISIS . But she was caught using Turkish intelligence , rather than British tip off . Turkey has become a popular route for those seeking to join extremists . It comes just days after three teenagers were caught at Istanbul airport . Two of them , aged 17 , were reported to be ' naive and impressionable ' cousins .