Fresh from probing the insurance broking community in the US, New York Attorney General Eliot Spitzer has filed a civil lawsuit against American International Group (AIG).

The suit alleges AIG manipulated its books to mislead regulators and investors and that senior managers including its former chairman and the firm’s CFO undertook several fraudulent business transactions that exaggerated the firm’s strength.

While the suit is aimed directly at three of the firm’s top executives, it attributes the misconduct at AIG directly to Greenberg. AIG has been cooperating with authorities and several implicated staff have been removed. The firm has admitted several of the transactions were improper and has announced plans to restate its earnings as a result.