Former acting DNI Richard Grenell is denying NBC News' reporting that he declassified incomplete transcripts of the surveilled conversations between former national security adviser Michael Flynn and Russian ambassador Sergey Kislyak.

Before leaving his post in the Trump administration this week, Grenell declassified the documents at the center of the Flynn unmasking controversy led by top Obama officials. However, NBC News White House correspondent Geoff Bennett suggested that only "summaries" of the calls were declassified.

"The Michael Flynn-Amb. Kislyak calls that Grenell has declassified are written summaries of the calls, not audiotapes," Bennett tweeted. "The summaries are not full transcripts, leaving the reader unable to know what’s been left out, former Trump admin officials tell @JoshNBCNews and @carolelee."

RICHARD GRENELL ACCUSES POLITICO OF 'FAKE NEWS' OVER REPORT THAT HE'S JOINING THE TRUMP CAMPAIGN

Roughly three hours later, however, Grenell refuted the claim.

"This isn't true," Grenell wrote.

Neither NBC News nor Josh Lederman, one of the reporters who was told about the claim, responded immediately to Fox News' request for comment.

NBC NEWS SLAMMED FOR CLAIMING GOP IS 'COURT-PACKING' INSTEAD OF FILLING VACANCIES

Grenell, one of the most outspoken former Trump officials on Twitter, similarly rejected Politico's report earlier this week that he was joining the Trump campaign following his stint as the top intelligence official.

"Fake news. Do you even check before writing? What has happened to Washington DC media?!" Grenell reacted to a now-deleted tweet from the Politico reporter who had shared the story.

Following Grenell's tweet, Politico updated its report with his response and reiterated that he "hadn't responded to a request for comment" prior to publication. No editor's note or correction was made.

A spokesperson for Politico told Fox News, "We stand by our reporting. Though Mr. Grenell failed to respond to multiple requests for comment prior to publication, we encourage him to do so and to detail what specific facts he believes are inaccurate in the story. We will certainly update the story to include them."

NBC ALLEGEDLY TELLS REPORTERS NOT TO USE THE WORD 'RIOTS' IN GEORGE FLOYD COVERAGE

Despite Politico's confidence in its reporting, Grenell doubled down, firing back at its communications vice president Brad Dayspring, who challenged the former acting DNI what specifically was incorrect about its report.

"The entire story isn’t true. And your response is scary - you don’t believe the campaign denial nor mine. But claim you have some anonymous source. Do you realize how ridiculous you sound?" Grenell asked.

"Let’s go point by point. Please state *SPECIFICALLY* what you believe to be untrue. Don't paint in broad strokes, let's have this discussion. Is your next job going to be on the Trump campaign? Yes or no?" Dayspring pressed Grenell.

"No. Delete the story, it’s false," Grenell shot back.

Grenell also did not respond to Fox News' request for comment.

Grenell, who previously served as the U.S. ambassador to Germany, caused a political firestorm in Washington, D.C., for a series of declassified documents involving the Russia investigation and the surveillance of former national security adviser Michael Flynn.

CLICK HERE TO GET THE FOX NEWS APP

He declassified the list of top Obama officials who had requested the unmasking of Flynn, including former Vice President Joe Biden, former FBI Director James Comey, former DNI James Clapper, former CIA Director John Brennan, former U.N. Ambassador Samantha Power, and former White House chief of staff Denis McDonough.

On his way out as acting DNI, Grenell also declassified the transcripts of Flynn's conversations with Russian ambassador Sergey Kislyak, which prompted the investigation into the former Trump official. They are now in the hands of incoming DNI John Radcliffe, who was confirmed last week by the Senate.