President Trump revealed highly classified information to Russian diplomats in a meeting at the White House last week, multiple media outlets reported on Monday.

The Washington Post broke the news on Monday afternoon that Trump relayed sensitive intel to Russian Foreign Minister Sergey Lavrov and Russian Ambassador to the U.S. Sergey Kislyak in a gathering at the Oval Office last Wednesday, the day after the president fired former FBI Director James Comey. The New York Times, Reuters and BuzzFeed confirmed the report.

The president reportedly revealed information about an Islamic State plot provided by a U.S. partner through an intelligence-sharing arrangement so sensitive it had been withheld from allies. According to the Post, Trump described a threat to the United States, and while he did not reveal the specific intelligence-gathering method at hand, he described a plot and revealed the city where the threat was detected.

After the meeting, senior White House officials made an attempt at damage control with the CIA and National Security Agency.

The White House denied the reports.

"The story that came out tonight as reported is false," National Security Adviser H.R. McMaster said in a press briefing.

Deputy National Security Adviser Dina Powell also said the story was false. Secretary of State Rex Tillerson said in a statement the president did not discuss "sources, methods or military operations" in the meeting.

Monday's reports came after days of turmoil for the Trump administration, starting with Comey's surprise ouster last Tuesday and unfolding from there.

Senator Bob Corker (R-TN) told Bloomberg the White House needs to "do something soon" to regain control and order. "Obviously they're in a downward spiral right now and they've got to figure out a way to come to grips with all that's happening," he said.

House Speaker Paul Ryan (R-WI) in a statement called for a "full explanation of the facts" from the Trump administration. "We have no way to know what was said, but protecting our nation's secrets is paramount," he said.

Markets, which have grown increasingly immune to Trump, did not react. Dow, Nasdaq and S&P 500 futures remained flat in Monday evening trading.