Special counsel Robert Mueller, who is investigating the Russian meddling in the 2016 US Presidential election campaign, has been handed over the data on accounts held by United States President Donald Trump.
Mueller had forced the German banking giant Deutsche Bank to submit documents about its client relationship with the president by issuing the bank with a subpoena for information, reported the Guardian.
Deutsche Bank, which has loaned the Trump organisation millions of dollars for real estate ventures, said it would not comment on any of its clients.
Trump's daughter and advisor in the White House, Ivanka Trump, her husband, Jared Kushner, who is also a presidential advisor; and Kushner's mother, Seryl Stadtmauer, are all the clients of the Deutsche Bank.
The bank told Bloomberg, in a statement, that it had always cooperated with investigating authorities.
This comes after Trump's former national security advisor Michael Flynn pleaded guilty to lying to the FBI about his conversations with the Russian ambassador in January.
Flynn is now cooperating with federal investigators.
Trump has ceaselessly thrown flak at the Mueller investigation and has denied the existence of any collusion between his campaign and Russia.
On being questioned if he was worried about what Flynn might say, the president said, "No, I'm not. And what has been shown is no collusion. No collusion. There has been absolutely no collusion. So we're very happy.
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