article_snippet: A 21-year-old woman arrest comes days after three teenage boys were stopped by police as three teenage boys tried to enter Syria from the Turkish capital.
article_snippet: It is not clear whether A 21-year-old woman had been in Syria before leaving Turkey.
article_snippet: Earlier this week three teenage boys were stopped as three teenage boys tried to join jihadis in the war-ravaged country.
article_snippet: The youngsters, described as 'naive' sixth form students, were caught by officials when The youngsters, described as 'naive' sixth form students parents phoned police to report concerns.
article_snippet: their parents were put on a flight back to London last week and questioned by counter terrorism police.
article_snippet: Three London schoolgirls have also fled the UK to join extremists in the Middle East.
article_snippet: 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.
article_snippet: 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 .
highlights_snippet: It comes after three teenage boys were stopped trying to enter Syria .
  
highlights_snippet: The youngsters had planned to join jihadis on the frontline when stopped .