The Washington Post story, authored by Miller and Greg Jaffe, cited current and former US officials and said President Donald Trump told Russian Foreign Minister Sergey Lavrov and Russian Ambassador to the US Sergey Kislyak about highly classified intelligence the US had received from an ally.
The information had been obtained by a USA partner and shared with Washington, the Post reported.
"The president and the foreign minister reviewed a range of common threats to our two countries including threats to civil aviation", McMaster said. "At no time were any intelligence sources or methods discussed, and no military operations were disclosed that were not already known publicly", he told the Post.
Trump is said to have described how the Islamic State was pursuing elements of a specific plot and how much harm that an attack of that magnitude could cause.
No other news source has confirmed the information in the Post report, and none of the information has been independently verified.
"The story that came out tonight as reported is false".
"This is code-word information", a US official familiar with the matter told the Post, referring to one of the highest levels of secret information held by USA spies. And when they say its classified, if it was public knowledge, then it could hurt the national security of the United States. "During that exchange the nature of specific threats were discussed, but they did not discuss sources, methods or military operations", Tillerson, who was in the meeting, said in a statement provided by White House press secretary Sean Spicer.
U.S. President Donald Trump meets with Russian Foreign Minister Sergei Lavrov at the White House.
Senators mulled over the latest stunning news, first reported by The Washington Post, as they met inside the chamber.
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The president has the right to declassify any information he wants, so the action was not illegal.
The visit was fraught with bad optics, and Kislyak's attendance - only confirmed by photos from Russian state media - was especially notable because he has been at the center of numerous Trump administration's controversies involving Russia. Martin Heinrich, D-N.M. However, for nearly anyone else in government, discussing sensitive classified information with an adversary would be against the law, the Post reported. I was in the room. Only TASS, Russia's official news agency, was allowed in to photograph the meeting; no US media were allowed.
Bob Corker, the Republican head of the Senate Foreign Relations Committee, called the allegations "very, very troubling" if true.
It was unclear precisely where they were coming from or what they were - but after a reporter tweeted about the noise, White House staffers quickly turned up the volume on the office television, blaring a newscast loudly enough to drown out any other potential noise.
Republican Sen. Lindsey Graham of SC told reporters that the report was "troubling, if true". He said if it's true, it would be a slap in the face to the intel community.
Even before he was inaugurated, intelligence professionals anxious about sharing classified information with Trump, who often shoots from the hip. "Risking sources & methods is inexcusable, particularly with the Russians".
Throughout the 2016 campaign, Trump slammed Hillary Clinton for storing classified information on her private email server.
House Speaker Paul Ryan didn't speak directly, but a spokesperson did release a statement on his behalf: "We have no way to know what was said, but protecting our nation's secrets is paramount".
"The speaker hopes for a full explanation of the facts from the administration".