Police in the West Midlands have been given an extra five days to question three men and one woman arrested on suspicion of Syria-related terrorism offences.
They can now be detained until March 4th.
Those detained include Moazzam Begg, who is suspected of attending a terrorist training camp. He previously spent nearly three years in Guantanamo Bay detention facility before being released without charge.
They were arrested in the early hours of yesterday morning.