WASHINGTON — At a closed briefing in 2003, the chairman of the Senate Intelligence Committee raised no objection to a C.I.A. plan to destroy videotapes of brutal interrogations, according to secret documents released Monday.

The senator, Pat Roberts, Republican of Kansas, also rejected a proposal to have his committee conduct its own assessment of the agency’s harsh interrogation methods, which included wall-slamming and waterboarding, the documents say.

But Mr. Roberts, through a spokesman, denied having approved the destruction of the videotapes, which is under criminal investigation, and defended his record in overseeing the interrogation program.

His assertions were backed by his former staff director on the Intelligence Committee, William D. Duhnke, who said that while the senator had not objected to the tapes’ destruction, he was “in receive mode” and was simply listening to get the facts about the interrogation program, which he was learning about for the first time.