Police have been given more time to question six people arrested in Dover on suspicion of Syria-related terrorism offences.
The five men and one woman were detained around 8am on Friday in the port's departure area.
Officers now have until 8am next Friday to charge or release them, or apply to detain them further.
Police said four of the men arrested are from Birmingham and in their 20s.
A 26-year-old man and a 23-year-old woman of no fixed address were also held.
They are being questioned at a police station in the West Midlands area.
The force said the suspects were not a family group, were not accompanied by children and did not pose any immediate risk to public safety.