Sen. Dianne Feinstein, D-Calif., said Thursday that the FBI report on sexual assault allegations against Supreme Court nominee Brett Kavanaugh is the "product of an incomplete investigation that was limited perhaps by the White House."

After reviewing the report 9 a.m. Thursday in the Senate SCIF (Sensitive Compartmented Information Facility), Feinstein told reporters that she could only talk "about what's not in it."

"The most notable part of this report is what's not in it. The FBI did not interview Brett Kavnauagh, nor did the FBI interview Dr. Blasey Ford," said Feinstein, ranking member on the Senate Judiciary Committee. "Deborah Ramirez's lawyer said he was unaware of any corroborating witnesses who were interviewed."

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Feinstein said she had limited time with the report as senators are cycled in and out of the SCIF to review its content.

"I had the opportunity to read some but not all of it," she said. "It looks to be the product of an incomplete investigation that was limited perhaps by the White House."

[Related: Attorney for Kavanaugh accuser: 'We have great concern' FBI is not conducting ‘serious investigation']

Feinstein argued that it's "not credible" for Republicans to say testimony in last week's hearing with Ford and Kavanaugh is a "substitute for FBI interviews."

Feinstein addressed reporters alongside Senate Minority Leader Chuck Schumer, D-N.Y., who called for the report to be made public Thursday after reviewing it's contents.

Schumer said that he disagrees with Judiciary Chairman Chuck Grassley's, R-Iowa, assessment that there was no hint of misconduct. Schumer wouldn't elaborate on why because the details of the report are not public.

Schumer and Feinstein did not take questions from press.