The special counsel's office spent $3.2 million in its first four months probing ties between President Donald Trump's top advisors and Russian Federation, according to a release issued Tuesday by the Department of Justice. The news came from German newspaper Handelsblatt, Bloomberg and Reuters, which cited unnamed sources.
"The Washington Post and The New York Times reported Saturday that a lead FBI investigator on the Mueller probe, Peter Strzok, was demoted this summer after it was discovered he'd sent anti-Trump texts to a mistress", the Journal said.
Mr Mueller is investigating claims of collusion between Mr Trump and Russian Federation.
An internal investigation carried out by Deutsche Bank didn't yield any evidence of connections between the client relationship with Trump and the bank's mirror trades affair, a person briefed on the matter said. "We have confirmed this with the bank and other sources", Dowd wrote in an email.
During his election campaign, Mr Trump said he would seek to improve ties with Russian President Vladimir Putin, which were strained during former president Barack Obama's administration.
A USA official with knowledge of Mr Mueller's probe said one reason for the subpoenas was to find out whether Deutsche Bank may have sold some of Mr Trump's mortgage or other loans to Russian state development bank VEB or other Russian banks that now are under U.S. and European Union sanctions. He has announced criminal charges against four people so far, including Trump's former national security advisor, Michael Flynn, who pleaded guilty to lying to the Federal Bureau of Investigation. In July, he told the New York Times such an action would amount to crossing a red line. Spending on the probe escalated rapidly as the investigation concluded, Government Accountability Office figures showed at the time.
Democratic senators, including Dianne Feinstein, suggested after the Flynn plea that Mueller might be building an obstruction of justice case against Trump.
As Mueller's investigation unfolds, Trump has gone on the offensive. In particular, Trump hailed the news that one of Mueller's aides had been removed from his job over the summer for some anti-Trump text messages.
As of Tuesday morning, neither the White House or Trump had commented on the report.