The New York Times recently reported that Donald Trump Jr., Erik Prince, and George Nader met with the leader of Psy Group, Joel Zamel, in August 2016, in what was described as a meeting to offer help to the Trump campaign.

“The emissary, George Nader, told Donald Trump Jr. that the princes who led Saudi Arabia and the United Arab Emirates were eager to help his father win election as president,” the Times reported. “The social media specialist, Joel Zamel, extolled his company’s ability to give an edge to a political campaign.”

It remains unclear whether the meeting resulted in any action. After the election, Nader allegedly paid Zamel a sum of up to $2 million for unknown reasons. Attorneys for Trump Jr. and Nader did not respond to a request for comment, and Erik Prince could not immediately be reached.

Marc Mukasey, An attorney for Zamel, issued the following statement:

Not only are you treading over ground that has been well traversed by others to no avail, but your facts are also wrong. You’re chasing ghosts and you’re mischaracterizing and/or misunderstanding the probe and the terms of art associated with grand jury investigations.

When asked if he had any substantive responses to the questions posed, Mukasey did not respond.

Mukasey has previously said that Zamel, “offered nothing to the Trump campaign, received nothing from the Trump campaign, delivered nothing to the Trump campaign and was not solicited by, or asked to do anything for, the Trump campaign.” It is uncertain why, according to Mukasey, Zamel met with then-candidate Trump’s son during the heat of the election campaign.

The meeting has drawn the intense scrutiny of Special Counsel Robert Mueller in recent months, according to one source familiar with this aspect of the investigation. In February, Mueller subpoenaed the Cypriot bank accounts of Psy Group. The same source said that the Israeli bank accounts of Psy Group have also been queried, though it is unclear if a subpoena was issued.