The FBI on Monday raided the office of President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE's personal lawyer, Michael Cohen, and seized emails, tax documents and records related to his payment to adult-film star Stormy Daniels.

Cohen's lawyer, Stephen Ryan, said in a statement that federal prosecutors in Manhattan obtained a search warrant after receiving a referral "in part" from special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE. Ryan called the search “completely inappropriate and unnecessary.”

The New York Times reported that the payment to Daniels is just one of "many topics" being looked at by the FBI.

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Other seized documents include business records and communications between Cohen and Trump, but the raid does not appear to be directly connected to Mueller’s probe of Russian meddling in the 2016 election, according to The Times.

Among the materials agents secured are those related to Cohen’s $130,000 payment to Daniels as part of a nondisclosure agreement related to her alleged 2006 affair with Trump.

The payment went through just days before the 2016 election. Cohen has admitted to paying Daniels, but denied it violated campaign finance laws.

Last week, Trump denied knowing about the payment. It was the first time he had addressed the issue publicly.

"You'll have to ask Michael Cohen," Trump said. "Michael is my attorney. You'll have to ask Michael."

Daniels, whose real name is Stephanie Clifford, filed a lawsuit last month claiming that a nondisclosure agreement she signed regarding the alleged affair is invalid because Trump never signed it. Her lawyer on Sunday filed a renewed motion to depose Trump and Cohen over the payment.

Cohen, who has been Trump's attorney for years, has previously been of interest in some aspects of the special counsel's probe.

Mueller reportedly sought documents and spoke to witnesses about Cohen’s involvement in negotiations to build a Trump Tower in Moscow. Cohen was reportedly in contact with Russian President Vladimir Putin’s chief spokesman about moving forward on the project, but did not receive a response.

Negotiations about the property fell apart in early 2016.

Updated at 4:26 p.m.