A member of US Vice-President JD Vance's security team has been suspended and is under investigation for allegedly leaking sensitive information, the US Secret Service (USSS) has said. The specifics of what was leaked have not been released, but the Secret Service said their agent faced a "potential criminal inquiry", involving allegations of "compromising operational and information security". "Any conduct that potentially threatens the safety of a protectee will not be tolerated," Secret Service spokesperson Anthony Guglielmi said. Vance and his family are required to have round-the-clock Secret Service protection. On Wednesday, Secret Service Director Sean Curran said the agency was operating in what he described as the most dangerous threat environment of his 24-year career.