Special Counsel Robert Mueller has asked German lender Deutsche Bank (db) to share data on accounts held by President Donald Trump and his family, according to reports from Bloomberg and Reuters Tuesday.
Germany’s largest bank received a subpoena from Mueller several weeks ago to provide information on certain money and credit transactions, the person added, confirming a report by German daily Handelsblatt published on Tuesday.
Deutsche Bank, which has loaned the Trump organization millions of dollars for real estate ventures, told Fortune it would not comment on any of its clients or on the legal proceedings.
Back in June, Deutsche had rejected demands in June by U.S. House Democrats to provide details of Trump’s finances, citing privacy laws. It stressed, however, that it would obey the law.
Mueller is investigating alleged Russian attempts to influence the 2016 U.S. presidential election and potential collusion by Trump aides.
Russia has denied meddling in the election and Trump has said there was no collusion.
However, the investigation appears to be gathering momentum, after the decision of former National Security Adviser Michael Flynn to plead guilty on Friday to lying to the FBI about his contacts with Russian officials during the transition between the Obama and Trump administrations.
Bloomberg reported that Mueller’s team has also interviewed various White House staff in recent days, including former Chief of Staff Reince Priebus, former spokesman Sean Spicer and National Security Council chief of staff Keith Kellogg. It cited people familiar with the investigation.