US Special Counsel Robert Mueller has reportedly ordered to see data on bank accounts held by Donald Trump and his family.
Special counsel Robert Mueller's "Russiagate" probe cost United States taxpayers $3.2 million in the first six months, mostly on salaries and benefits.
Both reports said Mueller issued the subpoena several weeks ago.
Deutsche Bank for months has rebuffed calls by Democratic lawmakers to provide more transparency over the roughly $300 million Trump owed to the bank for his real estate dealings prior to becoming president. It is not clear whether Mueller is interested in the bank accounts because they are connected to the Russian Federation probe or if he is investigating another matter.
The special counsel's investigation has focused on potential collusion between the Trump campaign and Russian Federation, as well as obstruction of justice by President Donald Trump, who might have tried to impede the investigation.
Mr Trump has repeatedly denied any collusion with Russian Federation, calling the allegations a "witch hunt".
CNN Congressional Correspondent Manu Raju tweeted that Republicans on the House Intelligence Committee actually blocked the Trump finances subpoena, refusing to order Deutsche Bank to hand over the Trump Organization's financial records.
Deutsche Bank management is ready to share information about the lender's dealings with Trump and is hopeful that doing so will help end the series of inquiries from Democrats, an executive at the bank, who asked not to be identified discussing private deliberations, has previously told Bloomberg News.
On December 1, Mueller reached a plea agreement with former national security adviser Michael Flynn, who pleaded guilty to giving misleading the Federal Bureau of Investigation about his contacts with then Russian Ambassador to the US, Sergey Kislyak.
In 2012, his Trump International Hotel Hotel and Tower in Chicago was loaned up to $640m, according to a property filing.
Former Trump campaign chair Paul Manafort and his deputy Rick Gates appeared in court after being indicted by a federal grand jury in October.
As Mueller's investigation unfolds, Trump has gone on the offensive.
Kushner, who is son-in-law to Trump spoke with Mueller's team for less than 90 minutes, the report said.
Special Counsel Robert Mueller departs Capitol Hill after briefing members of the U.S. Senate on his investigation in Washington, June 21, 2017.