Donald Trump Jr. speaks during a fundraiser for Faulkner University, Thursday, Oct. 5, 2017, in Montgomery, Ala.

Donald Trump, his son Donald Trump Jr. and others in the Trump organization were offered a website address and decryption key for hacked WikiLeaks documents during the 2016 presidential election — but those documents may have already been public, according to news reports.

The email, sent in September 2016, was provided to CNN by congressional investigators. It was purportedly sent by someone listed as "Mike Erickson." 

Investigators are reportedly looking into the legitimacy of the email, which was among the documents provided to Congress by the Trump Organization. According to CNN, it remains unclear who the actual sender of the email is.

Trump Jr.'s attorney, Alan Futerfas, told CNN that he did not know who Mike Erickson is.

"We have no idea who he is," Futerfas said. "We never responded to the email."

The email was sent to Trump, Trump Jr. and others two months after the Democratic National Committee's hacked emails were released on WikiLeaks. It also came a month before Clinton campaign chairman John Podesta's emails were leaked.

But the Washington Post noted that the email, which the outlet said it also obtained, pointed the campaign to documents that had already been made public by WikiLeaks the day before. The organization had already tweeted links to what it said were "678.4 MB of new 'DNC documents.'" 

CNN corrected its story Friday afternoon with the new information.

Later at a rally in Pensacola, Fla., Trump pointed to the CNN correction as well as other corrections and clarifications issued by news organizations over the last week.

“Did you see all the corrections the media’s been making?” Trump asked the crowd. “They’ve been apologizing left and right.”

Trump Jr. has previously released messages he exchanged with WikiLeaks, the anti-secrecy website that promises to advocate for transparency by publishing leaked and secret material, during the 2016 campaign.

The revelation of the latest email comes the same week that House lawmakers demanded answers from Trump Jr. as part of their ongoing probe into Russian meddling in the 2016 election. 

More: Eight things Congress wants to know from Donald Trump Jr. about his Russia contacts

Related: Donald Trump Jr. corresponded with WikiLeaks during campaign

Contributing: The Associated Press