Former CIA Director John Brennan told the House Intelligence Committee Tuesday morning that President Donald Trump violated protocol when he reportedly shared highly classified Israeli intelligence with Russian officials in an Oval Office meeting in early May.

Aside from reports that the U.S. was not authorized to share the intelligence at all—information about an ISIS plot involving explosives concealed in laptops—Brennan says the manner Trump did so was a breach of procedure.

“Such intelligence, classified intelligence is not shared with visiting foreign ministers or local ambassadors, it’s shared through intelligence channels because it needs to be handled the right way and needs to make sure it’s not exposed,” he said. “He didn’t do that, again if the press charges are accurate.”

“Secondly,” Brennan continued, “before sharing any classified intelligence with foreign partners, it needs to go back to the originating agency to make sure that the language in it is not—even just providing the substance—going to reveal sources or methods and compromise the future collection capability. It appears as though, at least from the press reports, that neither did it go in the proper channels nor did the originating agency have the opportunity to clear language for it. That is a problem.”