Rep. Loretta Sanchez (D-Calif.) said lawmakers learned "significantly more" about the spy programs at the National Security Agency (NSA) during a briefing on Tuesday with counterterrorism officials.

"What we learned in there," Sanchez said, "is significantly more than what is out in the media today."

Lawmakers are barred from revealing the classified information they receive in intelligence briefings, and Sanchez was careful not to specify what members might have learned about the NSA's work.

"I can't speak to what we learned in there, and I don't know if there are other leaks, if there's more information somewhere, if somebody else is going to step up, but I will tell you that I believe it's the tip of the iceberg," she said.