The special counsel Robert Mueller plans to issue new indictments in the Russia investigation as early as Tuesday, CBS reported.

Since Mueller took over the investigation in May 2017, his team has charged Americans once affiliated with President Donald Trump's campaign or administration, as well as Russian nationals and intelligence officers.

The special counsel Robert Mueller is expected to issue new indictments as part of the Russia investigation as soon as Tuesday, CBS reported, citing multiple sources with knowledge of the probe.

Meanwhile, acting Attorney General Matthew Whitaker plans to consult with Department of Justice ethics officials about whether he should recuse himself from the investigation into the Trump campaign's ties to Russia, a department representative said Monday.

Since Mueller took over the investigation in May 2017, his team has charged four Americans once affiliated with Trump's campaign or administration, 13 Russian nationals, 12 Russian intelligence officers, three Russian companies, and three other people.

They include Paul Manafort, the former Trump campaign chairman, George Papadopoulos, a former Trump campaign adviser, and Michael Flynn, Trump's former national security adviser.

Read more: Here's everyone who has been charged and convicted in Mueller's Russia probe so far

Talks between Manafort and Mueller's team have reportedly stalled.

November and December are widely expected to be busy months for Mueller, following a quiet period during which prosecutors, following DOJ guidelines, avoided taking any actions that could be seen as influencing the outcome of the midterm elections.

For months, Mueller has been zeroing in on the longtime GOP strategist Roger Stone and his associates, and whether Stone or any other Trump associates had advance knowledge that Russia had stolen batches of emails from the Democratic National Committee and Hillary Clinton's campaign and disseminated them via WikiLeaks, the pro-transparency group founded by Julian Assange.

In addition to Stone, Mueller has also focused on the far-right commentator Jerome Corsi, who told NBC News on Monday that Mueller's team told him he would be indicted.

"I don't recall ever meeting Julian Assange or getting information from anyone about what he had including the Podesta emails," Corsi said Monday, referring to John Podesta, the Clinton campaign chairman. "But they have all your emails and phone records … They're very good at the perjury trap."