Deutsche Bank has reportedly been subpoenaed by special counsel Robert Mueller to provide information on President Trump's accounts.

Reuters, citing an unidentified source, reported that the bank received the subpoena several weeks ago and was asked to give data on accounts of Trump and his family.

The Trump Organization has been loaned millions of dollars from Deutsche Bank, the news outlet reported.

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Earlier this year, five Democrats on the House Financial Services Committee sent a letter to Deutsche Bank's chief executive officer seeking information on Trump's past transactions.

Deutsche Bank in June responded, saying that U.S. privacy laws prevent it from disclosing details about Trump's finances and his potential ties to Russia.

Mueller is currently investigating Russia's interference in the 2016 presidential election and whether there was collusion between the Trump campaign and Moscow. Last week, former national security adviser Michael Flynn pleaded guilty to lying to the FBI about his contacts with Russia's ambassador to the U.S.

He is now cooperating with Mueller's investigation.

His plea deal came after Mueller revealed charges against former Trump campaign officials Paul Manafort and Richard Gates.

In July, there were reports that Mueller was looking into Trump's business transactions as part of his ongoing probe.

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Trump warned Mueller at the time that expanding the probe to his business ties would cross a line.

"I think that's a violation. Look, this is about Russia," Trump said.

This report was updated at 7:32 a.m.