The special counsel investigation into Russia's role in the 2016 election is expected to look into the chain of emails released by Donald Trump Jr. on Tuesday, CNN reported, citing a U.S. official.

The emails, which were made public by Trump Jr. on Twitter, revealed that the president's son had accepted a meeting with a Kremlin-connected lawyer promising damaging information about Democrat Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE in June 2016.

In the chain, Trump Jr. was told by a publicist, Rob Goldstone, that the information was "part of Russia and its government's support for" his father.

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"Seems we have some time and if it's what you say I love it especially later in the summer," Trump Jr. replied in the email chain.

Three officials told CNN federal investigators the "details of the interactions" between Trump Jr., Goldstone and the lawyer weren't "fully known" to investigators until recently. The report does not specify when the FBI first learned of the emails.

Trump Jr. posted the conversation on his Twitter account after The New York Times obtained a copy of the emails.

The Russian attorney, Natalia Veselnitskaya, whom Trump Jr. and other campaign members met with has denied working on the behalf of Russia's government and said Tuesday that she had no damaging information about Clinton to offer, The Associated Press reported.

Special counsel Robert Mueller, who was appointed to lead the Russia probe in May, is looking into the Kremlin's efforts to meddle in the election, as well as possible coordination between members of the Trump campaign and Moscow.

President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE and his allies have repeatedly denied any coordination with Russian officials and have slammed the investigation as an effort to undermine his presidency.