(Updated at 6:01 p.m. ET)
(CNN) - U.S. Senate nominee Alvin Greene, a political unknown who became the surprise winner of the South Carolina Democratic primary, was indicted Friday by a grand jury on obscenity charges.
Greene was indicted on one felony count of "disseminating, procuring or promoting obscenity," according to the Richland County clerk of courts.
He was also indicted on a misdemeanor count of "communicating an obscene message to another person without consent."
Greene told CNN Senior Political Editor Mark Preston that his lawyer "is dealing" with the indictments.
Following the announcement of Greene's indictment, South Carolina Democratic Party Chair Carol Fowler released a statement asking Greene to resign.
"In June, I asked Mr. Greene to withdraw his candidacy because of the charges against him. Following today's indictments, I repeat that request," Fowler said.
"It will be impossible for Mr. Greene to address his legal issues and run a statewide campaign. The indictment renews concerns that Mr. Greene cannot represent the values of the Democratic Party or South Carolina voters."