A 21-year-old woman has been arrested by counter terror police at Luton Airport after landing on a flight from Istanbul . The woman , a British national , remains in the custody of Scotland Yard officers after being detained this morning . Her arrest comes days after three teenage boys were stopped by police as they tried to enter Syria from the Turkish capital . A 21-year-old woman was arrested at Luton Airport this morning as she landed on a flight from Istanbul . 'This morning at 11.15am officers from the Counter Terrorism Unit SO15 arrested a 21-year-old woman at Luton Airport on suspicion of preparation of acts of terrorism under section 5 of the terrorism act , ' a Scotland Yard spokesman said . 'The woman , a British national , was arrested as she entered the UK having landed on a flight from Istanbul . She is currently in custody . ' It is not clear whether the woman had been in Syria before leaving Turkey . Earlier this week three teenage boys were stopped as they tried to join jihadis in the war-ravaged country . The youngsters , described as 'naive ' sixth form students , were caught by officials when their parents phoned police to report concerns . They were put on a flight back to London last week and questioned by counter terrorism police . Three London schoolgirls have also fled the UK to join extremists in the Middle East . Shamima Begum , 15 , Kadiza Sultana , 16 , and 15-year-old Amira Abase were captured on CCTV boarding a 17-hour bus to the Syrian border from Istanbul . Shamima Begum , 15 , Kadiza Sultana , 16 , and 15-year-old Amira Abase were captured on CCTV boarding a 17-hour bus to the Syrian border from Istanbul . Sorry we are not currently accepting comments on this article .
The woman was arrested by counter terrorism police shortly after 11 am . She had been on a flight from Istanbul when arrested this morning . It occurred after three teenage boys were spotted trying to flee Syria . The youngsters had attempted to confront jihadis on the frontline when arrested .