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Two GOP-led committees will review Russian hacks and grill top intel officers Thursdayby Kellan Howell

Both the Senate Foreign Relations and Armed Services committees are set to dive into a probe of cyber attacks that U.S. intelligence officials say were directed by Russian hackers to meddle with the 2016 election. 

The Armed Services Committee will hold a hearing and will listen to testimony from top intelligence officials, including Director of National Intelligence James Clapper. 

Meanwhile, the Foreign Relations committee will hold a closed-door briefing with administration officials to learn more about the White House's response to the hackings. 

Victoria Nuland, an assistant secretary of State; Gentry Smith, the director of the State Department's foreign missions office; and Danny Toler, a deputy assistant secretary at the Department of Homeland Security will brief lawmakers, according to a notice from the committee.

The meetings come a day after President-elect Donald Trump tweeted about his continued skepticism of U.S. intelligence assessments that Russia was behind the attacks on the DNC and other political party networks. 

Last week, President Obama announced new sanctions against Russia in retaliation for the hacks. The U.S. also kicked out 35 Russian diplomats and shuttered two Russian compounds in Maryland and New York. 

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