The number of people arrested for terrorism-related offences in the UK hit a record high after 50 women were arrested in the year to September.
The figure was more than double the number of women arrested for similar offences the previous year, the new Home Office statistics show.
There was also a sharp increase in the number of 21- to 24-year-olds detained.
Both statistics led to the total number of terror arrests rising by a third, compared to the previous year, to 315.
There was also a 31% increase in arrests for international-related terrorism.
The highest number of arrests took place between April and June 2015, when 80 men and 14 women were detained.
Thirty-nine per cent of those arrested through the year were charged, 22% were released without charge, and the rest have been released on bail.
In addition to releasing data about arrests, the Home Office report revealed details about the number of people who were stopped and searched on "reasonable suspicion" of being a terrorist.
People who consider themselves Asian British or Asian saw the largest increase in searches, up 53% on last year. This was a factor in the overall 31% increase in searches related to terrorism.