Mueller battles with Russian firm run by 'Putin's chef' to hide millions of 'sensitive' documents from the Kremlin
Official FBI photo of Robert S. Mueller.

Special counsel Robert Mueller's team is attempting to bar a Russian firm tied to Vladimir Putin from accessing millions of "sensitive" documents over concerns that they will make their way to the Kremlin.

Bloomberg News reported Thursday that Eric Dubelier, the American lawyer representing Concord Management — the company "accused of bankrolling efforts to interfere in the 2016 election" — claimed that his client's company needs to see the more than three million documents to prepare his case.

Mueller's team, however, argued that the other information shared with Concord made its way to the Internet after it was transferred to the firm's attorney.

Concord was one of the three companies and 13 individuals Mueller charged with electoral interference in 2017 and is run by Yevgeny Prigozhin, a caterer known as "Putin's chef," Bloomberg noted.

Dubelier appeared to suggest to U.S. District Judge Dabney Friedrich that he could share the documents "through a trans-Atlantic video conference link from his law office, rather than sending copies to Russia where unauthorized people could see them," the report noted.

Mueller team prosecutor Jonathan Kravis countered that the attorney couldn't ensure that bad actors would not have access to the link.

The report noted that after 90 minutes of open court arguments, Judge Friedrich cleared the courtroom and continued the proceedings in secret.