The New York attorney general’s office has issued subpoenas for two of Donald Trump’s children — Donald Trump Jr. and Ivanka Trump — as part of its ongoing civil investigation into the Trump Organization.

According to the Associated Press, New York Attorney General Letitia James’ office said the subpoenas were issued “in connection with an investigation into the valuation of properties owned or controlled.”

However, according to ABC News, Ivanka and Donald Jr. refused to comply with the subpoenas, citing a court document that read, “A dispute has arisen between the OAG and the Individual Trump Parties regarding the Subpoenas.” The dispute was made public on Monday (Jan. 3) when the judge in the investigation set a briefing schedule, CNN reports.

Trump’s third child, Eric Trump, who served as an executive vice president at Trump Organization, has already been subpoenaed and gave his testimony pertaining to the investigation last year.

As reported by REVOLT, the former POTUS was also subpoenaed by the New York attorney general’s office with a deadline of Jan. 7, which his lawyers said they would fight to dismiss.

James’ office has been investigating the Trump Organization on allegations of financial fraud for over two years, which yielded criminal charges against its chief financial officer Allen Weisselberg and two related corporate entities last year. They previously pleaded not guilty to the charges.

In a statement, Trump’s attorney Ronald Fischetti called the probe “purely political” and a “witch hunt.”

“We will wait until we see what they show us in their subpoena and we will respond with our motions,” he said. “This is purely political and he has done nothing wrong and we are not surprised at all.”

James ended her bid for New York governor last month and pledged to continue her work as attorney general instead.

“There are a number of important investigations and cases that are underway, and I intend to finish the job,” she tweeted at the time.