As was reported on Friday, former Trump associates, Paul Manafort, Carter Page, and Roger Stone were all subject to an investigation by U.S. intelligence agencies, as well as law enforcement, who were looking into any communications or financial arrangements the men had with the Russian government.

On Sunday, the Wall Street Journal reported that U.S. counterintelligence agents conducted an investigation into another Trump team member’s involvement with Russia – newly named National Security Adviser Michael Flynn.

To be specific, his communications were investigated by the CIA, FBI, and National Security Agency.

The WSJ said it’s unclear when the inquiry began or whether it produced any incriminating evidence. Its unknown if the matter is closer or ongoing. The report came hours after Flynn was sworn in Sunday, along with other senior advisers.

The key focus is a series of calls Flynn made to Russian Ambassador to the U.S. Sergey Kislyak on Dec. 29, the WSJ reported, the day the Obama administration announced sanctions against Russia.

The purpose behind the investigation is to determine why Flynn reached out to Russian officials and if those communications were in violation of the law.

The White House is denying that any such investigation has taken place.