Secret Service investigates party crashers at State Dinner

United States Secret Service agents are conducting an internal review to determine how Washington area socialites Tareq and Michaele Salahi managed to sneak in to President Barack Obama's first State Dinner on Tuesday despite high security.

The breach was first reported by The Washington Post late Wednesday, when photos of the couple appeared in media coverage of the dinner, but their names weren't on the list of expected attendees.

Michaele Salahi has been filmed for the reality TV show "Real Housewives of Washington," which is in production. She and her husband own a winery in Virginia that entered into bankruptcy in February of 2009.

Former national security advisor to President George W. Bush, Fran Townsend, told CNN that the Salahis could face felony charges if it is determined that they lied to White House security about whether or not they were invited.

At noon on Wednesday, Michaele Salahi posted photos of herself during the cocktail hour of the state dinner on her Facebook page (including this one, with Vice President Joe Biden), but it's unclear whether the couple was actually seated for dinner. There are no pictures from the dinner portion of the evening or the after-dinner entertainment.

Along with the photos, Salahi posted what appears to be a response to claims that she and her husband crashed the dinner. "I was honored to be invited to attend the First State Dinner hosted by President Obama & the First Lady to honor India," she begins, but the post quickly morphs into a promotional message for a polo match the Salahis are sponsoring.

The Secret Service investigation is ongoing, but sources tell CNN the security breakdown appears to have taken place at the level of uniformed officers, rather than the White House Social Secretary's office or the State Department, which helped coordinate the visiting Indian delegation.