One senior U.S. intelligence official who attended the event – the annual Office of Strategic Services Society awards dinner — tells NBC News that he saw the two speak to each other at the Oct. 27 event. The official did not know details of the conversation.

The duo’s presence at the same event was first reported by the conservative weekly Human Events, which reported that they attended together. But numerous partygoers interviewed by NBC News disputed that…

Said one former senior U.S. intelligence official who attended, “It’s mind-boggling that she could be so reckless as to show up at high-profile events like this, shortly after learning the FBI was investigating their affair.”