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Donald Trump has denied leaking his own tax returns claiming he has "no idea" how they ended up in the possession of a journalist.

The President was accused of releasing the information himself to deflect attention away from investigators finding no evidence to back his claim Barack Obama wiretapped him.

House Intelligence Committee Chairman Devin Nunes - a member of the President’s Republican Party - said neither he nor the ranking Democrat on the committee had seen any proof to back up Trump’s claim.

"We don't have any evidence that that took place and in fact I don't believe, just in the last week of time, the people we've talked to, I don't think there was an actual tap of Trump Tower," Nunes said in reference to the baseless claim made by the US leader several weeks ago.

(Image: AFP/Getty Images) (Image: Getty Images North America)

The move came just hours after part of Trump’s 2005 tax return was mysteriously delivered to an investigative journalist fuelling speculation Trump knew what the House Intelligence Committee had found so far.

The release of just two pages captivated much of the political world after MSNBC's Maddow teased before the show that they had obtained them.

Trump told Fox News' Tucker Carlson on Wednesday: "I have no idea where they got it, but it's illegal and they're not supposed to have it and it's not supposed to be leaked and it's certainly not an embarrassing tax return at all.

"But it's an illegal thing they've been doing it, they've done it before and I think it's a disgrace."

(Image: Supplied by WENN.com)

The President has broken with decades of precedent becoming the first leader since Richard Nixon in the 1970s to refuse to release his tax returns.

He repeatedly cited an ongoing IRS audit - of which he had produced no evidence of - in refusing to do so but said he would eventually release them when the audit was complete.

However, his aides have since said he now refuses to heighten speculation he may have links to foreign countries.

The developments came as Federal prosecutors announced charges against four men, including two Russian spies, for their roles in a conspiracy that led to the 2014 theft of 500 million Yahoo accounts, one of the largest known data breaches.

(Image: Getty)

Now the journalist who was sent the 2005 tax return, Pulitzer Prize-winning investigative reporter David Cay Johnston, has said Trump might be behind the leak.

"By the way, let me point out that it's entirely possible that Donald Trump sent this to me. Donald Trump has, over the years, leaked all sorts of things," said Johnston, founder of DCReport.org. Johnston won his Pulitzer in 2001 for his stories on the inequality of the tax code while he was with The New York Times.

Trump has since hit out at the journalist venting his alleged fury on Twitter.

"Does anybody really believe that a reporter, who nobody ever heard of, 'went to his mailbox' and found my tax returns? @NBCNews FAKE NEWS!" Trump tweeted.

The reporter, David Caye Johnston, fired back minutes later: 'Gee, Donald, your White House confirmed my story. POTUS fake Tweet. Sad!'