President Donald Trump’s former National Security Adviser Michael Flynn on Thursday told the FBI and members of Congress that he is willing to be interviewed in exchange for a grant of immunity, the Wall Street Journal reported.

Flynn made the offer to the House and Senate Intelligence Committees and the FBI via his lawyer but has not succeeded in striking a bargain, according to the Wall Street Journal report, which cited unnamed officials with knowledge of the matter.

Robert Kelner, who is Flynn’s attorney, declined to comment to the Wall Street Journal.

The House and Senate Intelligence Committees are in the midst of separate ongoing investigations into Russian interference in the 2016 election.

Flynn resigned as national security advisor in February after reports revealed that he spoke about Obama-era sanctions in a call with Russian Ambassador Sergey Kislyak before President Donald Trump’s inauguration. This contradicted members of Trump’s administration, including Vice President Mike Pence, who previously denied that Flynn and Kislyak discussed sanctions.

According to a report by the Washington Post published later the same week, Flynn also denied in an interview with the FBI that he discussed sanctions with Kislyak.

Trump said at the time that he did not direct Flynn to discuss sanctions with Kislyak, but would have encouraged it.

In March, the White House confirmed that, in addition to that call, Flynn met with Kislyak for about 20 minutes at Trump Tower in December.

Less than a week later, Flynn registered with the Justice Department as a foreign agent for $530,000 worth of lobbying work he did before the 2016 election that “could be construed to have principally benefited the Republic of Turkey.”