Russia's ambassador to the U.S. has told his superiors that he and Jared Kushner discussed setting up a secret communications channel between the Trump transition team and the Kremlin in December, The Washington Post reported.
Kushner is Donald Trump's son-in-law and a trusted adviser to the president.
The Post report cites anonymous U.S. officials who were briefed on intelligence reports on intercepted Russian communications.
The newspaper said Ambassador Sergei Kislyak told his superiors that Kushner proposed using Russian diplomatic facilities for their discussions, apparently to make them more difficult to monitor. The Post said Kislyak was reportedly "taken aback" by the suggestion.
The White House in March confirmed that Kushner and the ousted national security adviser, Michael Flynn, met with Kislyak at Trump Tower in December.
Kushner's role in his father-in-law's campaign and now his presidency make him a seemingly obvious person that investigators would want to know more about and possibly speak with as they probe connections between Moscow and associates of Trump.
Kushner has already volunteered to speak with Congress about those meetings, and his attorney says he is willing to cooperate with any additional investigations.
The statement from attorney Jamie Gorelick came amid reports that the FBI is scrutinizing Kushner's encounters as part of a broader investigation into Russian interference in the 2016 presidential election.
The interest in Kushner would move the investigation into the White House, though there is no indication that Kushner is accused of wrongdoing or that he is a target.