Sen. Elizabeth Warren, D-Mass., said Thursday that the FBI's supplemental report detailing sexual assault claims against Supreme Court pick Brett Kavanaugh includes elements that contradict what the nominee told the Senate Judiciary Committee.

But Warren, speaking on the Senate floor, said she wasn't allowed to talk about the details of her finding because of the rules all senators are following that limits what they can say.

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"The available documents contradict statements Mr. Kavanaugh made under oath," Warren said on the Senate floor.

Warren said that while senators have been "muzzled," she was allowed to say two other things about the FBI report after seeing it.

"One, this was not a full and fair investigation," she said. "It was sharply limited in scope and did not explore the relevant confirming facts."

"Two, the available documents do not exonerate Mr. Kavanaugh," she said.

[More: Dianne Feinstein: FBI report is 'product of an incomplete investigation']

Warren argued on the floor that Republicans were preventing senators from talking about the report, which is comprised of statements made to the FBI that include nonverified information because the FBI did not submit a conclusion outlining what it believes to be true or false. That uncertainty is why senators agreed in 2009 not to release these kinds of reports, since they could include false and damaging information about nominees.

Still, Warren laid the blame for the secrecy on Republicans.

"I would like to back up these three points with explicit statements from the FBI documents, explicit statements that should be available for the American people to see," she said. "But the Republicans have locked the documents behind closed doors with no plans to inform the American public of any new information about the Kavanaugh nomination."