Exclusive - CIA says its inspector general is resigning at end of month

The logo of the U.S. Central Intelligence Agency is shown in the lobby of the CIA headquarters in Langley, Virginia March 3, 2005.

WASHINGTON (Reuters) - CIA inspector general David Buckley, who investigated a dispute between the agency and Congress over the handling of records of the CIA's detention and interrogation activities, is resigning effective Jan. 31, the CIA said on Monday.

The agency said in a statement that Buckley, who has served as the agency's internal watchdog for more than four years, was leaving the agency to "pursue an opportunity in the private sector."