Justice Department officials said on Monday that the number of people who had been detained in connection with the Sept. 11 attacks had surpassed 1,000, and civil liberties advocates said the government's refusal to disclose the identities of those held and the charges against them raised the possibility of secret detentions.
The arrests have been shrouded in confusion and secrecy, with the Justice Department providing a running tally but declining in most cases to provide names and details.
Justice Department officials said on Monday that they are slowly releasing information about some of the arrests but are prohibited from doing so in some cases and are not required to do so in many others. Mindy Tucker, a Justice Department spokeswoman, stressed that all of those arrested have had access to lawyers.
Nonetheless, a coalition of civil liberties groups said on Monday that it would file a lawsuit against the government demanding that officials identify who has been arrested, what charges have been filed against them and where they are being held.
"While certain aspects of the FBI investigation into the terrorist attacks need to be secret, we do not live in a country where the government can keep secret who they arrest, where they are being held, or the charges against them," said Kate Martin, the director of the Center for National Security Studies, one of several groups that on Monday called on the government to give out more information.
"The secret detention of more than 800 people over the past few weeks is frighteningly close to the practice of `disappearing' people in Latin America," she said in a statement.
Gregory Nojeim, the legislative counsel of the American Civil Liberties Union, said on Monday that he and a few others from his organization met on Friday with Robert Mueller, the director of the FBI, to ask for more information about those arrested. He said that Mueller was largely unresponsive and provided no information.
Tucker, the Justice Department spokeswoman, said those detained fall into three categories: a small number of material witnesses; about 180 people charged with immigration violations; and the largest group, those being held on federal, state or local criminal charges unrelated to the Sept. 11 attacks.
Tucker said the number of those arrested in connection with the investigation of the terrorist attacks is now 1,017; most of those people are still in custody. She said that Attorney General John Ashcroft was confident that all the actions of law enforcement officials in the investigation had been consistent with the law and the Constitution's protections.
In the early days of the investigation, the Justice Department acknowledged that two people had been arrested on material witness warrants. Tucker said more have been held on such warrants, but she would not say how many; the arrest files of everyone in that category have been sealed because of a continuing grand jury investigation.
Of the people arrested on possible immigration violations, she said, all are believed to have some connection to terrorist organizations or have some information, although none have been charged with terrorist crimes.
Tucker said the arrests on immigration charges for people suspected of having some involvement in terrorist activities reflected the department's new approach emphasizing prevention of terrorist acts. Ashcroft said last week that the department would prosecute people suspected of association with terrorist groups on whatever charges it could find in order to get them out of the country or in jail.



