Washington (CNN) -- The chairman of the Senate Intelligence Committee suggested Tuesday the CIA violated federal law by secretly pulling classified documents from her panel's computers during a staff probe of the spy agency's controversial detention and interrogation program.
Sen. Dianne Feinstein said CIA Director John Brennan told her in January that agency personnel searched the computers because they believed the panel's investigators might have had gained access to materials on an internal review they were not authorized to see.
"The CIA did not ask the committee or its staff if the committee had access to the internal review or how we obtained it," Feinstein said in blistering remarks on the Senate floor. "Instead, the CIA just went and searched the committee's computer."
Feinstein said that she had "grave concerns" the search may have violated federal law.
Brennan disputed Feinstein's claims.
"As far as the allegations of CIA hacking into Senate computers -- nothing could be further from the truth. We wouldn't do that. I mean that's, that's, that's just beyond the scope of reason," Brennan told the Council on Foreign Relations.
He also said that the CIA believes in congressional oversight and often has "spirited" conversations about agency techniques.
"We have made mistakes. More than a few. And we have tried mightily to learn from them," Brennan said.
His remarks come a week after Brennan said in a statement that that he was "deeply dismayed" that some members of the Senate have made "spurious allegations about CIA actions that are wholly unsupported by the facts."
The Justice Department is looking at whether to launch an investigation of the matter involving the committee's review of millions of documents at a Virginia facility and counterclaims by the CIA about Intelligence Committee staffers gaining access to things they shouldn't have seen.
Feinstein said in her remarks that committee staff "did not hack into CIA computers to obtain these documents, as has been suggested in the press."
She said the documents were identified through a search tool provided by the CIA in order to select specific material.