WASHINGTON (AP) — National security adviser H.R. McMaster is standing by his statement denying a Washington Post report that President Donald Trump revealed highly classified information to Russian officials.

Speaking to reporters Tuesday, McMaster said the "premise of that article is false." He added Trump did not have a "conversation that was inappropriate or resulted in any kind of lapse in national security.

McMaster said the real threat to national security was leakers "releasing information to the press."

The Washington Post reported Monday that Trump shared classified information with Russian officials that jeopardized an intelligence source.

McMaster told reporters after the story broke: "I was in the room. It didn't happen."

Copyright 2017 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.