A 26-year-old Cornwall man has been arrested on suspicion of preparing to travel to Syria to carry out acts of terrorism.
Devon and Cornwall police and the South East Counter Terrorism Unit arrested the man at an address in Hayle, Cornwall, on Monday night.
The suspect was detained under Section 5 of the Terrorism Act and is being questioned by officers from at a police station in the Devon and Cornwall area.
This arrest related to an investigation by the SECTU and officers have reassured residents the alleged offence was not linked to any immediate threat in the UK.
West Cornwall Local Police Area Commander Supt Jim Pearce said: "I would like to reassure the community that this investigation should have very little impact on local residents. The arrest was pre-planned and was not made in response to any immediate threat to public safety in Hayle.
"Our officers will continue to maintain a presence in the area, offering reassurance to the local community."
If anyone from the local community has any concerns or information contact police on the 101 number or the Anti-Terrorist Hotline 0800 789 321; all calls will be treated with the strictest confidence.