Former Guantanamo detainee Moazzam Begg is one of four people who have been arrested on suspicion of terrorism offences linked to the Syria conflict.
Police confirmed the 45-year-old was among three men and a woman from the West Midlands held on Tuesday morning.
Mr Begg, a British citizen, is suspected of attending a terrorist training camp and facilitating terrorism overseas.
A 36-year-old man, a woman aged 44 and her 20-year-old son were also held on suspicion of facilitating terrorism overseas.
http://news.sky.com/story/1216890/ex-guantanamo-inmate-held-over-syria-terror