A new revelation that a celebrity-seeking couple who sneaked in uninvited into a state dinner shook hands with President Barack Obama and possibly Prime Minister Manmohan Singh too has prompted fresh questions about the seriousness of the security breach.

A White House photograph released Friday shows Michaele Salahi, wearing a gold-accented red sari, clasping her hands around Obama's right hand as her smiling husband, Tareq, looks on. In the photo, a smiling Manmohan Singh is seen standing next to the president in a reception line at Tuesday's dinner in his honour.