The FBI is probing a defunct bank in Cyprus that had been used by affluent Russians and has been accused by the U.S of money laundering, The Guardian reported on Sunday.

U.S. investigators and the Treasury Department reportedly requested information about FBME Bank from the Central Bank of Cyprus in November.

One source told the publication that the request was tied to special counsel Robert Mueller's investigation into President Trump's former campaign chairman Paul Manafort. The source also said the investigation was tied to money that had flowed from Russia to the U.S. through banks in Cyprus.

Bloomberg reported last month that authorities in Cyprus provided Mueller's team with documents detailing the financial activities of Manafort and his business associate Richard Gates just days before they were indicted last fall.

The indictment against Manafort and Gates claims the pair had funneled over $75 million through foreign bank accounts in Cyprus and other countries.

Manafort and Gates had at least 15 accounts with Cypriot banks, according to Bloomberg.

Manafort was charged in October with conspiracy against the United States, tax fraud and money laundering as a part of Mueller's probe into alleged ties between the Trump campaign and Russia.

The Hill has reached out to the Treasury Department for comment. The special counsel's office declined to comment.

FBME denied being involved in money laundering in a statement on Saturday.

"FBME has not engaged in money-laundering and was never accused of such until the FinCEN allegations. The Bank has acted in compliance with all the EU and Cyprus Anti-Money Laundering directives; a fact corroborated by multiple third party auditors," the bank said.

The report comes as Mueller continues to probe alleged ties between the Trump campaign and Russia.

- This story was updated at 4 p.m. EST.