US President Donald Trump's son-in-law Jared Kushner is under scrutiny from the FBI investigation into links between the administration and Russia, US media report.
The Washington Post and NBC News reported Mr Kushner was being investigated because of his interactions with Russians, including Russian ambassador Sergey Kislyak and a banker from Moscow.
The development does not mean Mr Kushner is suspected of a crime, but it places the probe in the Trump family circle.
Mr Kushner, a real estate investor and developer, is a senior White House adviser in the Trump administration.
The FBI, several congressional committees and a special counsel appointed by the Justice Department are looking into allegations of meddling by Russia in the 2016 US election and possible ties between Mr Trump's presidential campaign and Russian officials seeking to influence the election.
Mr Trump denies any collusion between his campaign and Russia.
It was not known whether Mr Kushner had received any requests from the FBI for records.
One of Kushner's attorneys, Jamie Gorelick, said in a statement her client would cooperate with the investigation. "Mr Kushner previously volunteered to share with Congress what he knows about these meetings. He will do the same if he is contacted in connection with any other inquiry," the statement said.
The Washington Post said Mr Kushner was the only current White House official known to be considered a key person in the probe.
Investigators are focusing on a series of meetings held by Mr Kushner, the newspaper said, including a meeting between with and Russian Ambassador Sergei Kislyak and one he held last year with a Russian banker.
US officials told NBC the interest in Mr Kushner did not mean the investigators suspected him of a crime or intended to charge him.
- Reuters / BBC