An adviser to the United Arab Emirates who met with Jared Kushner and Steve Bannon during the presidential transition is cooperating with special counsel Robert Mueller, the New York Times reports.

George Nader, who attended a January 2017 meeting in the Seychelles with informal Donald Trump adviser and Blackwater founder Erik Prince (the brother of Secretary of Education Betsy DeVos), gave testimony to the grand jury last week. Mueller is reportedly looking into whether Nader “funneled” money from the UAE to Trump’s political campaign, according to the Times.

Nader is an adviser to UAE Crown Prince Mohammed bin Zayed Al-Nahyan. As the Times reports, Nader “represented” bin Zayed Al-Nahyan during a meeting in the Seychelles shortly before Trumps inauguration. The Times reports: “At the meeting, Emirati officials believed Mr. Prince was speaking for the Trump transition team, and a Russian fund manager, Kirill Dmitriev, represented Mr. Putin, according to several people familiar with the meeting.”

Nader also attended meetings in the White House with Kushner and Bannon. He's been questioned "numerous times" by the special counsel's team.