Mueller now investigating millions of dollars worth of Russia-linked donations to Trump's inaugural committee

Special counsel Robert Mueller is now probing millions of dollars donated to President Donald Trump's inaugural committee — including many made by donors connected to Russia and Middle Eastern countries.

ABC News reported Friday that among the "several" witnesses interviewed by the special counsel is Trump's longtime friend and business associate Thomas Barrack, the person responsible for overseeing the expensive inauguration in early 2017.

"According to a source who has sat with the Mueller team for interviews in recent weeks, the special counsel is examining donors who have either business or personal connections in Russia, Saudi Arabia, the United Arab Emirates and Qatar," the report reads. "Several donors with those ties contributed large sums to the non-profit fundraising entity – gifts that topped out at $1 million dollars, according to public records."

Mueller's team has also asked witnesses questions about individual donors, "including American businessmen Leonard Blavatnik and Andrew Intrater," the report noted. None have been accused of wrongdoing.