A former senior executive at Marsh & McLennan and two executives at American International Group, the US insurance companies, have pleaded guilty to charges of fraud levelled by Eliot Spitzer, the New York state attorney general.

It brings to nine the number of scalps Spitzer has claimed from executives at AIG, Marsh & McLennan, ACE and Zurich Financial Services since launching his probe into bid rigging and price fixing in the insurance industry last year.