Pictures of the woman posing in a bikini were splashed on news websites in the US as the Secret Service removed three agents involved in the scandal.

The Secret Service did not identify the agents or eight others it said remain on administrative leave.

However two of the agents were named by media as David Chaney and Greg Stokes. Mr Chaney was allowed to retire while Mr Stokes, who is said to be head of the Canine Training Section, was fired. The third agent resigned.