A mother feared to have been planning to travel to Syria with her four children has been arrested after returning to the UK.
Zahera Tariq, 33, was detained in Turkey on Tuesday along with her sons Muhammad, 12, Amaar, 11, Aadid, four and daughter Safiyyah, nine.
The Metropolitan Police's Counter Terrorism Command (SO15) placed her under arrest on suspicion of child abduction at around 7.45pm on Thursday after she disembarked from a flight from Istanbul at Luton Airport.
Her four children - who were earlier this week reported to be "safe and well" - have been taken into police protection.
The woman and four children were reported missing from their home in Walthamstow, north east London, last week.
They were believed to have flown from London City Airport to Amsterdam on August 25.
Detectives later found the family had been captured on CCTV at London City Airport before boarding the flight to the Netherlands.
A Metropolitan Police spokesman said: "Officers from the Met's Counter Terrorism Command (SO15) have today arrested a 33-year-old woman at Luton Airport on suspicion of child abduction.
"The woman was arrested at approximately 7.45pm as she was entering the UK, having just disembarked a flight from Istanbul, Turkey.
"Her four children with whom she was travelling were taken into police protection.
Several cases have emerged in which women and children from the UK are feared to have gone to parts of Syria controlled by the so-called Islamic State.
Scotland Yard recently confirmed that it believed more than 40 women and girls had travelled to Syria from Britain in the last year.