Federal agents have raided the office of President Donald Trump’s personal attorney Michael Cohen, to seize records.

The raid prompted a new blast Tuesday from the president, who tweeted that “Attorney-client privilege is dead!”

A furious Trump, who in the last month has escalated his attacks on Robert Mueller’s Russia investigation, said Monday from the White House that it was a “disgrace” that the FBI “broke into” his lawyer’s office. He called Mueller’s investigation “an attack on our country,” prompting new speculation that he might seek the removal of the Justice Department’s special counsel.

The raid was overseen by the U.S. Attorney’s office in Manhattan and was based in part on a referral from Mueller, said Cohen’s lawyer, Stephen Ryan.

“The decision by the U.S. Attorney’s Office in New York to conduct their investigation using search warrants is completely inappropriate and unnecessary,” Ryan said in a statement. “It resulted in the unnecessary seizure of protected attorney client communications between a lawyer and his clients.”

The raid creates a new legal headache for Trump as he and his attorneys weigh whether to agree to an interview with Mueller’s team, which in addition to investigating potential ties between Russia and the Trump campaign is also examining whether the president’s actions constitute obstruction of justice.

Search warrants are a fairly standard, though aggressive, law enforcement tool and are often sought in cases where authorities are concerned someone may hide or withhold evidence. To obtain one, agents must convince a judge they have probable cause of criminal activity and they believe they’ll find evidence of wrongdoing in a search. A warrant requires high-level approval within the Justice Department, and agency guidelines impose additional hurdles when the search target is an attorney.

Authorities working with Mueller chose a similar tactic last summer when they raided the home of former Trump campaign chairman Paul Manafort, who was subsequently indicted.

In this case, Mueller opted to refer the matter to federal prosecutors in Manhattan. Besides Cohen’s office, agents also searched a hotel room where he’s been staying while his home is under renovation.

Under Justice Department regulations, Mueller must consult with Deputy Attorney General Rod Rosenstein when his investigators uncover new evidence that may fall outside his original mandate. Rosenstein then will determine whether to allow Mueller to proceed or to assign the matter to another U.S. attorney or another part of the Justice Department.

A spokesman for Mueller’s office did not immediately return a call seeking comment. White House spokeswoman Sarah Huckabee Sanders and the U.S. attorney’s office also had no comment. Monday’s raid was first reported by The New York Times.

Ryan did not elaborate on the documents taken from Cohen’s office but said he has cooperated with investigators, including meeting last fall with lawmakers looking into Russian interference in the 2016 election.

Several former officials at the Federal Election Commission have said the payment appears to be a violation of campaign finance laws, and multiple Washington-based groups have filed complaints with the FEC, urging it to investigate.

The woman had claims she had an inappropriate relationship with Trump in 2006. She has been suing to invalidate the nondisclosure agreement she signed before the election and has offered to return the $130,000 she was paid in order to “set the record straight.”

Federal agents searched Cohen’s office at 30 Rockefeller Plaza in New York, where he had been working as part of a “strategic partnership” with the law firm Squire Patton Boggs.

On Monday, the firm said in a statement that its relationship with Cohen had “reached its conclusion, mutually and in accordance with the terms of the agreement.”

“We have been in contact with Federal authorities regarding their execution of a warrant relating to Mr. Cohen,” the firm said. “These activities do not relate to the firm and we are in full cooperation.”

(AP)