Washington: A former boyfriend of Indian-American billionaire investor Vinod Khosla's daughter has been charged with threatening to publish her naked photos as part of an extortion plot.

FBI agents last week arrested Douglas Tarlow, 27, a Stanford University graduate, who dated Khosla's daughter Nina for about two years, in connection with the alleged extortion plot, according to The Smoking Gun, an investigative news site. Tarlow was subsequently released from custody and is scheduled for a US District Court preliminary hearing Friday.