Federal prosecutors have issued grand jury subpoenas to associates of former National Security Advisor Michael Flynn, CNN reported Tuesday. The network learned of the subpoenas just hours before President Donald Trump fired FBI director James Comey.
The move represents the first sign of significant activity in the FBI investigation into possible ties between the Trump campaign and Russia.
The subpoenas were issued in the last few weeks by the US Attorney’s Office in Alexandria, Virginia and were received by associates who worked with Flynn after he was fired as director of the Defense Intelligence Agency in 2014.
According to CNN, investigators are looking into Flynn’s handling of payment disclosures from foreign governments including Russia and Turkey.
Flynn was fired as national security advisor earlier this year after misrepresenting conversations he had with Russia’s ambassador in Washington, Sergey Kislyak.
Flynn may have also broken the law when he failed to disclose a $45,000 payment from an event in Moscow celebrating the Russian-owned news outlet, Russia Today.
Flynn denied any wrongdoing, noting that he briefed the the administration on his trip to Russia.
In March, Flynn registered as a foreign agent for the Turkish government.