The top Democrat on the Senate Intelligence Committee said the CIA has heavily redacted her panel’s final report of its investigation into the agency’s detention and interrogation practices, so she would have to spend some time reviewing what they withheld before determining when it could be released.

Sen. Dianne Feinstein, D-Calif., who chairs the panel, said she received a redacted executive summary of the report Friday afternoon.

“A preliminary review of the report indicates there have been significant redactions,” she said in a statement. “We need additional time to understand the basis for these redactions and determine their justification.”

“Therefore the report will be held until further notice and released when that process is completed,” she concluded.

The Intelligence Committee’s report was expected to be released in the coming days, but a review of the CIA redactions could take days, if not weeks, in and of itself.

The report’s release also was complicated this week by news about the results of a CIA Office of Inspector General investigation into allegations that the CIA spied on Senate staffers conducting the investigation into the agency’s detention and interrogation activities after the Sept. 11, 2001, terrorist attacks.

CIA Director John Brennan apologized to Feinstein and ranking member, Sen. Saxby Chambliss, R-Ga., and acknowledged that the yet-to-be released inspector general’s report found that the some in the agency violated an agreement with the Senate about access to the computers its aides were using.

But the snooping admission and apology didn’t satisfy two Democratic senators, Mark Udall of Colorado and Martin Heinrich of New Hampshire, both of whom called for Brennan’s resignation.

Udall late Friday said he shared Feinstein's concerns about the redactions, "especially given the president's unequivocal commitment to declassifying the Senate Intelligence Committee's study."

"I promised earlier this year to hold the president to his word, and I intend to do so," he said.

Chambliss said he opposed the study from the beginning and views it as an "ideologically motivated and distorted recounting of events" that reopens a debate that Congress, the executive branch and the Supreme Court settled years ago.

While he said he would review the redactions, he encouraged people to read the minority report, which he said was "not a defense of the CIA" but instead points out the flaws in the Democrat-led investigation.