Washington - U.S. President Donald Trump, without offering evidence, directly accused former Special Counsel Robert Mueller of committing a crime on Wednesday, saying Mueller had illegally “terminated” FBI communications as part of his Russia investigation.

The Justice Department and a Mueller spokesman did not immediately respond to requests for comment.

“Mueller terminated them illegally. He terminated all of the emails. ... Robert Mueller terminated their text messages together. He terminated them. They’re gone. And that’s illegal. That’s a crime,” Trump said in an interview with Fox Business Network, referring to two former Federal Bureau of Investigation employees who exchanged disparaging messages about the president.

Trump made the remarks ahead of Mueller’s scheduled testimony before lawmakers next month about his investigation into Russian interference in the 2016 U.S. election and whether the Trump campaign colluded with Moscow.

The Republican president, who formally launched his re-election bid last week, repeatedly railed against Mueller’s probe during the two-year investigation and accused several of the team’s investigators of being Democrats targeting him.

He has also accused Mueller of having a business conflict of interest tied to Trump’s Mar-a-Lago resort in Florida, as well as for meeting with him early in Trump’s White House term about the possibility of leading the FBI a second time. Read more at Reuters