US Attorney General Michael Mukasey has signed new guidelines for FBI operations he said are designed to better protect the country from terrorist attacks, but that raise concern of some lawmakers and civil rights groups. The new, revised regulations -- the original version met strong criticism from congressional committees last month -- comprise 50 pages dealing with five areas of FBI investigation, including criminal, national security and foreign intelligence. Despite Mukasey's assurances that the new regulations reflect consultation with Congress as well as privacy and civil liberties groups," not all concerns over their effect on privacy rights were dispelled. [The] Senate Judiciary Committee chairman, Democrat Patrick Leahy, said the new guidelines expand the FBI's powers of surveillance. "It appears that with these guidelines, the attorney general is once again giving the FBI broad new powers to conduct surveillance and use other intrusive investigative techniques on Americans without requiring any indication of wrongdoing or any approval even from FBI supervisors," Leahy said in a statement. "The American people deserve a ... Justice Department that does not sacrifice or endanger their rights and privacy," he added. The American Civil Liberties Union, who had called for an investigation into the first version of the FBI regulations, said the new rules "reduce standards for beginning 'assessments.'" "More troubling still," it added, "the guidelines allow a person's race or ethnic background to be used as a factor in opening an investigation, a move that the ACLU believes may institute a racial profiling as a matter of policy."