A man and a woman from Birmingham have been arrested on suspicion of possessing documents likely to be of use to someone committing or preparing an act of terrorism.
The two, a brother and sister aged 23 and 18, were arrested this morning in the Small Heath area of the city.
The arrests are said to have been pre-planned and police say they were not made in response to any threat to public safety.
Computers and other electronic devices which will undergo forensic examination.
Officers say a number of files need to be investigated, which is likely to take some time.
More top news
Scientists at the University of Leicester say a discovery they've made is the first step in developing a drug that would cure malaria.
With its theatres, museums and even Godiva Festival, Coventry has been recommended to bid to become the UK City of Culture in 2021.
Paul Dadge become the unwitting face of the 7/7 rescue effort after a picture of him helping a woman in the aftermath went around the world.