"This is just the beginning of this probe", Nunes told reporters.
"We're not going to jump to any conclusions at this time, but one of the things as you know that we're concerned about is whether or not there was an FBI investigation, and if so, why was Congress not informed of this matter", Nunes said. A second investigation by the House Oversight and House Judiciary committees will look into why the FBI isn't charging Clinton for her use of a personal email server.
What was the uranium deal?He made those allegations after visiting the White House, leading Democrats to accuse him of coordinating his efforts with the Trump administration.
Since uranium is considered a strategic asset, with implications for national security, the deal had to be approved by a committee composed of representatives from a number of United States government agencies.
Donald Trump and Republicans also allege that the uranium company donated to the Clinton Foundation to enlist Mrs Clinton's support - an accusation she dismissed as "baloney".
Trump steps up attack on National Football League with new anthem protests petition
In a tweet, he wrote, "The NFL has decided that it will not force players to stand for the playing of our National Anthem". Dallas Cowboys owner Jerry Jones said any of his players kneeling during the anthem risked being benched.
The line of attack was renewed recently after the Hill reported that the Federal Bureau of Investigation had found "substantial evidence" that Russian officials engaged in "bribery, kickbacks, extortion and money laundering created to grow Vladimir Putin's atomic energy business inside the United States" before the Obama administration gave the deal the go-ahead.
But President Donald Trump took an immediate interest in the story after The Hill published its report, tweeting on Thursday that the "Uranium deal to Russian Federation, with Clinton help and Obama Administration knowledge, is the biggest story that Fake Media doesn't want to follow!"
Comey was later fired by President Trump.
The new investigation from Nunes and Gowdy is sure to further inflame the simmering partisan tensions on the intelligence committee over the investigation into Russian election interference.
He had "temporarily" removed himself from matters relating to the Russian Federation investigation amid Democrats' allegations that he'd broken ethics rules in his panel's Russian Federation probe.
The panel's top Democrat spoke out against the uranium probe Tuesday, describing it as a "coordinated distraction" from the Russian Federation interference in the 2016 election, a subject the panel is investigating.
Ian Prior, a Justice Department spokesman, said the department plans to "fully cooperate with this important congressional investigation".