JD Vance's Secret Service detail has had one of its agents sidelined amid allegations he leaked details about the movements of the vice president's family to unauthorised parties. The move raises fresh questions about security protocols surrounding senior US officials, coming at a time of heightened concern over threats against the administration's leadership and their relatives.

The agent, assigned to protect Vance's household, was removed from active duty while an internal investigation examines claims that travel information relating to the vice president's wife and children was disclosed inappropriately. The Secret Service has not detailed the exact nature of the leaked information or to whom it was allegedly passed, and the inquiry into the agent's conduct is understood to be ongoing.