LOS ANGELES: The FBI and the US secret service are investigating after what appear to be Michelle Obama's credit report, including her social security number, phone numbers, bank, mortgage and credit card details, were posted on the internet along with those of celebrities and politicians.

Financial information purporting to relate to more than a dozen high-profile figures including the politicians Sarah Palin and Arnold Schwarzenegger, the singers Beyonce and Britney Spears, Mel Gibson, the actor, and Donald Trump, the property tycoon, was published by cyber criminals on a website believed to have originated in Russia.

FBI agents said they may have used information to obtain money from victims and warned those targeted to put fraud alerts on their bank accounts.