The FBI and the Justice Department have launched a criminal investigation into real estate transactions involving New York Attorney General Letitia James.

It’s the first known criminal probe of a law enforcement official who took action against President Donald Trump, according to The Washington Post .

One of the transactions involves the 2023 purchase of a home in Virginia that James said in transaction documents would be her primary residence, according to the Times Union in Albany . As a statewide elected official, James is required by law to have her main home in New York.

A defense attorney representing James said the home in Virginia was to be used by James’ niece as her primary residence, the Times Union said. James has called allegations that she was planning to live in Virginia baseless and her attorney said other documents make it clear the home was for her niece.

The allegations involving the home in Virginia have been circulating online among Trump allies, but the existence of a criminal probe involving federal law enforcement agencies is a major escalation against James, according to The Guardian .

A Trump administration official previously sent a criminal referral letter about the matter to the Justice Department.

The probe appears to be “multipronged” with involvement from the FBI in both New York and Virginia, the Guardian said.

“This is being handled at this time by main (Department of) Justice and the Albany FBI field office,” said U.S. Attorney John A. Sarcone III , who oversees the U.S. Attorney’s Office in New York’s Northern District, according to the Times Union. “We stand prepared to act in the capacity that we need to when and if we are informed there’s a charge to be made. Unlike Letitia James, who unethically ran around the state campaigning on getting Donald Trump… my office conducts itself in a manner that is proper and professional.”

Trump allies also have alleged that James lied on the paperwork to get a first-time homebuyer benefit, according to the Post.

James has been a significant political opponent of Trump. She previously brought a lawsuit against him before his reelection that accused him of inflating his net worth to secure financial benefits, according to the Guardian.

The case ended with an order requiring Trump to pay $450 million in penalties.

James has also joined with other Democratic attorneys general to file multiple lawsuits against Trump and his administration during both his terms, according to the Post.

James has dismissed the allegations against her as politically motivated retribution, the Guardian said.