New York attorney general Tish James has subpoenaed former President Donald Trump’s eldest children as part of an ongoing civil fraud investigation, according to a new court filing.

Donald Trump Jr. and Ivanka Trump were subpoenaed on December 1, The New York Times reported, citing a person with knowledge of the matter. Eric Trump was questioned in late 2020.

The court filing referencing the subpoenas said they were served “in connection with an investigation into the valuation of properties owned or controlled by Donald J. Trump or the Trump Organization.” It went on to say that a “dispute has arisen” between the attorney general’s office and the Trump family regarding the subpoenas.

A person familiar with the investigation previously told The Washington Post that James is looking into whether rampant fraud “permeated the Trump Organization,” and The Times reported last month that James wants Trump to sit for a deposition on January 7.