Ten foreign nationals believed to be a threat to national security have been detained by the Immigration Service, including one man who was held in the West Midlands.
The individuals, who the Home Office refused to name, were held by four police forces working with the Immigration Service.
West Midlands Police confirmed that it had assisted in the operation, which saw one person detained at an undisclosed location in the force area.
Home Secretary Charles Clarke said: "In accordance with my powers to deport individuals whose presence in the UK is not conducive to the public good for reasons of national security, the Immigration Service has today detained 10 foreign nationals who I believe pose a threat to national security.
"They will be held in secure prison service accommodation and I shall not disclose their names.
"Following months of diplomatic work we now have got reason to believe that we can get the necessary assurances from the countries to which we will return the deportees so that they will not be subject to torture or ill-treatment."
More on this story in Friday's Birmingham Post