WASHINGTON, Oct. 11 — The director of the Central Intelligence Agency, Gen. Michael V. Hayden, has ordered an unusual internal inquiry into the work of the agency’s inspector general, whose aggressive investigations of the C.I.A.’s detention and interrogation programs and other matters have created resentment among agency operatives.

A small team working for General Hayden is looking into the conduct of the agency’s watchdog office, which is led by Inspector General John L. Helgerson. Current and former government officials said the review had caused anxiety and anger in Mr. Helgerson’s office and aroused concern on Capitol Hill that it posed a conflict of interest.

The review is particularly focused on complaints that Mr. Helgerson’s office has not acted as a fair and impartial judge of agency operations but instead has begun a crusade against those who have participated in controversial detention programs.

Any move by the agency’s director to examine the work of the inspector general would be unusual, if not unprecedented, and would threaten to undermine the independence of the office, some current and former officials say.