Police have arrested a woman at Heathrow Airport on suspicion of committing a terror offence.
The 22-year-old had just arrived in the UK from Turkey when she was taken into custody by officers.
The personnel from the Counter Terrorism Command section of the Metropolitan Police made the arrest at around 10:20pm on Tuesday.
The woman is being held at a police station in London on suspicion of belonging to an organisation banned under the terms of section 11 of the Terrorism Act.
The Metropolitan Police have said she was also detained under the Police and Criminal Evidence Act.