WATCH: Trump shuts down CNN reporter during contentious exchange

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NEW YORK (WIBW/AP) -- Donald Trump says intelligence agencies will have a "tremendous blot on their record" if they leaked a report claiming top intelligence officials told him about an unsubstantiated report that Russia had about him.

Trump's press secretary Sean Spicer also calls a report, first published Tuesday by CNN, "outrageous" and "irresponsible." During his news conference Wednesday, Trump refused to take a question from CNN reporter Jim Acosta, calling him fake news.

A U.S. official says top intelligence officials told Trump about an unsubstantiated report last week.

A summary of the allegations was separate from a classified assessment of Russia's suspected attempts to meddle in the U.S. presidential election. Trump and President Barack Obama were briefed on the intelligence community's findings last week.

The dossier contains unproven information about close coordination between Trump's inner circle and Russians about hacking into Democratic accounts as well as unproven claims about unusual sexual activities by Trump among other suggestions attributed to anonymous sources. The Associated Press has not authenticated any of the claims.

CNN's decision to publish carefully sourced reporting about the operations of our government is vastly different than Buzzfeed's decision to publish unsubstantiated memos. The Trump team knows this. They are using Buzzfeed's decision to deflect from CNN's reporting, which has been matched by the other major news organizations.

We are fully confident in our reporting. It represents the core of what the First Amendment protects, informing the people of the inner workings of their government; in this case, briefing materials prepared for President Obama and President-elect Trump last week.

We made it clear that we were not publishing any of the details of the 35-page document because we have not corroborated the report's allegations. Given that members of the Trump transition team have so vocally criticized our reporting, we encourage them to identify, specifically, what they believe to be inaccurate.