President Trump shared “highly classified” information with Russian Foreign Minister Sergei Lavrov and Ambassador Sergey Kislyak during their visit to the White House last week, the Washington Post reports.

Sen. Mark Warner, the top ranking Democrat on the Senate Intelligence Committee, quickly expressed his concern over the report:

The information shared by Trump is reportedly exceptional:

The details “were considered so sensitive that they had been withheld from allies – and under close hold within the U.S. government as well,” said Jessica Estepa of USA Today.

Trump reportedly revealed U.S. knowledge of a possible threat, even going so far as to reveal the Islamic State territory designated as the source of the threat.

The president “revealed more information to the Russian ambassador than we share with our own allies,” said one source to the Post.

Officials contacted the CIA, NSA after Trump’s comments:

Per the Post, a number of top White House officials called the National Security Agency and Central Intelligence Agency, hoping to “contain the damage.”

President Trump – and, by extension, the White House – were never granted permission to share the information in question.

Tillerson, McMaster respond: