The Senate Intelligence Committee has subpoenaed documents and testimony from former Trump campaign adviser Carter Page as part of its investigation into Russian interference in the 2016 presidential election, NBC News reported Tuesday.

Politico reported last week that Page told the Intelligence Committee he would invoke his Fifth Amendment right to remain silent and would not comply with the committee's request for documents. He later refuted that report, saying he had offered to testify on Nov. 1.

The panel's previous requests to Page have been voluntary. A subpoena would compel the former campaign adviser to testify.

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The former Trump campaign foreign policy adviser, however, has offered to appear at an open hearing before the panel on Nov. 1. He has said he was interviewed by the FBI earlier this year about possible links between the Trump campaign and Moscow.

Page referred NBC News to comments published in the Washington Examiner last week, saying he had offered to participate in the Nov. 1 hearing. He did not say whether he was subpoenaed.

Page has come under particular scrutiny in the ongoing investigations into Russia's efforts to meddle in the presidential election because of his meeting at the 2016 Republican National Convention with then-Russian Ambassador Sergey Kislyak.

The former campaign adviser has also called on the government to release information about his communications that were collected by the FBI during the presidential campaign.

That the FBI was able to obtain a warrant indicates that the bureau convinced a Foreign Intelligence Surveillance Court judge that there was probable cause to believe that Page was acting on behalf of the Russian government, according to a Washington Post report published in April.

Page has denied any improper contact or coordination between the Trump campaign and Russia.