Societe Generale SA, Royal Bank of Canada, and Bank of AmericaCorp. are among nine additional banks that were subpoenaed in NewYork and Connecticut's probe of alleged manipulation of Libor, aperson familiar with the matter said.

The subpoenas, issued by New York Attorney General EricSchneiderman starting in August, bring to 16 the total number ofbanks that have been subpoenaed in the states' investigation, saidthe person, who asked not to be identified because there wasn'tauthorization to speak publicly.

Schneiderman and Connecticut Attorney General George Jepsen arejointly investigating claims that banks rigged the London interbankoffered rate, or Libor, a worldwide benchmark for borrowing. Thesame person said in August that seven banks were subpoenaed intheir investigation, including JPMorgan Chase & Co. andBarclays Plc.

The states are coordinating with “a much larger group ofattorneys general,” Susan Kinsman, a spokeswoman for theConnecticut attorney general, said in September. Florida AttorneyGeneral Pam Bondi has also issued subpoenas to more than a dozenfinancial institutions, including UBS AG, Deutsche Bank AG and HSBCHoldings Plc.

Besides Societe Generale, Royal Bank of Canada and Bank ofAmerica, the other six banks to receive subpoenas from New Yorkare: Credit Suisse Group AG, Bank of Tokyo Mitsubishi UFJ Ltd.,Norinchukin Bank, Rabobank, Lloyd's Banking Group Plc, and West LBAG, a German lender that ceased operations.

Representatives of those banks couldn't be reached for commentor declined to comment on the subpoenas.

Lloyd's has said it is assisting various regulators in theirinvestigations into the setting of Libor. Royal Bank of Canada hassaid it is cooperating with regulators and found no evidence ofcollusion with other banks.

Rabobank said in a report this year that it has receivedsubpoenas and requests for information from regulatory agencies inthe U.S., Europe and Asia and is cooperating.

Melissa Grace, a spokeswoman for Schneiderman, and JaclynFalkowski, a spokeswoman for Jepsen, declined to comment on theprobe.

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