Story highlights Former FBI Director James Comey testified on Thursday

Comey told senators in a closed hearing that Sessions may have had a third interaction with Russia's ambassador to the US

Washington (CNN) Sen. Richard Blumenthal said Thursday that if Attorney General Jeff Sessions did have a third, undisclosed meeting with Russia's ambassador to the United States, it "could be perjury."

CNN reported earlier Thursday that fired FBI Director James Comey told senators in a closed hearing that Sessions may have had a third interaction with Russia's ambassador to the US, according to people familiar with the briefing.

Comey explained that the possibility there could have been another encounter was not something he wanted to discuss in the earlier public hearing, according to a source familiar with the briefing.

"I can't confirm what may have been provided in a classified setting, but with a third meeting, even without it, what we have is a pattern of contacts with the Russians by (Michael) Flynn, by Sessions, by (Jared) Kushner -- secret and then concealed," the Connecticut Democrat told CNN's Erin Burnett on "OutFront" on Thursday.

It "could be perjury," he added.

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