File Photo—President Donald Trump speaks during a meeting with President of the European Commission Jean-Claude Junker and European Council President Donald Tusk at European Union headquarters, Thursday, May 25, 2017, in Brussels.

The FBI and Congress are examining a campaign event last spring during which Donald Trump, Jeff Sessions and Jared Kushner were in a small gathering with Russian ambassador to the U.S. Sergey Kislyak and other diplomats at Washington's Mayflower Hotel, multiple U.S. officials told NBC News.

Five current and former U.S. officials told NBC News they are aware of classified intelligence suggesting there was some sort of private encounter between Trump and his aides and the Russian envoy, despite a heated denial from Sessions, according to NBC News.

Kushner also denied through a spokesman that he met privately with Kislyak that day.

The officials acknowledged to NBC News that the evidence does not amount to proof, and they have declined to provide details about it.

Michael Cohen Faces Congress for 1st of 3 Days of Testimony

Michael Cohen, President Donald Trump's former attorney, faced the Senate Intelligence Committee on Tuesday on the first of three days of scheduled testimony during which Cohen is expected to outline campaign hush money payments, lying and even crimes committed in office. (Published Tuesday, Feb. 26, 2019)

"The Department of Justice appointed special counsel to assume responsibility for this matter," Department of Justice spokeswoman Sarah Isgur Flores said in a statement. "We will allow him to do his job. It is unfortunate that anonymous sources whose credibility will never face public scrutiny are continuously trying to hinder that process by peddling false stories to the mainstream media. The facts haven't changed; the then-Senator did not have any private or side conversations with any Russian officials at the Mayflower Hotel."

