The North Carolina senator later clarified his statement, leaving the question of whether Flynn would comply with the subpoena up in the air.
In April, the committee sent a series of requests to several former President Trump associates asking for records on any dealings with Russian Federation - a request Flynn's lawyers declined to cooperate with through counsel, sparking the subpoena.
The former top national security adviser to the Trump White House was forced out of the position in February after it became known that he did not disclose contact he'd had with Russian diplomat Sergei Kislyak to Vice President Mike Pence.
Despite the disclosure, Trump appointed Flynn as his national security adviser.
Last week, the Senate subpoenaed a large number of documents regarding Flynn's interactions with Russian officials.
Flynn has been under scrutiny from the Justice Department since at least November 30, when the department's Foreign Agent Registration Act unit sent him a letter questioning whether he needed to register as a foreign agent for lobbying work he performed for a Turkish businessman. Following the election, Flynn had reportedly discussed with Kislyak the potential of establishing a back channel communication between Trump and Russian President Vladimir Putin that would circumvent the USA national security community, Reuters reports.
On Thursday he called it "the single greatest witch hunt" in USA history.
Flynn's lawyers did not immediately respond to a request for comment or confirmation.
On April 1, the Senate panel turned down the offer, according to NBC News.
Meanwhile, the House Intelligence Committee on Thursday asked the Justice Department and the FBI for documents, also requested by other congressional panels, that involve Trump's firing of former FBI Director James Comey and any related memos.
The Intelligence Committee is seeking to interview Flynn as part of its probe of Russian election interference. The process took years, however, and the judge ultimately declined to hold Holder in civil contempt - which would have resulted in fines being assessed against Holder. Instead the Senate could exercise one of two options: It could vote on a contempt referral to be passed on to the Justice Department for enforcement.