The documents include handwritten notes, apparently prepared by Justice Department officials, discussing the possibility of prosecuting some employees of the Central Intelligence Agency. The notes reveal that the Justice Department considered prosecuting a C.I.A. interrogator for a previously reported incident in which a detainee was threatened with a gun and a power drill, but it says department officials declined to prosecute the case.

The documents were released in the latest response to several Freedom of Information Act lawsuits filed by the American Civil Liberties Union and Judicial Watch,a Washington, D.C., advocacy group. Some are new versions of documents previously released.

Newly disclosed passages from a 2008 report by the Justice Department inspector general describe what agents of the Federal Bureau of Investigation saw at the C.I.A. jail where Ramzi bin al-Shibh, one of the plotters of the Sept. 11, 2001, terrorist attacks, was being questioned.

The F.B.I. agents helped C.I.A. officers prepare questions for Binalshibh but “were denied direct access to him for four or five days,” said the report. Then an F.B.I. agent, identified as “Thomas,” was allowed to see him and found him “naked and chained to the floor.”