Exhibit 16 DIRECTORS POWER OF ATTORNEY City of Minneapolis State of Minnesota Each of the undersigned, as directors of the below listed open-end investment company: 1933 Act 1940 Act Reg. Number Reg. Number ----------- ----------- RIVERSOURCE DIVERSIFIED INCOME SERIES, INC. 2-51586 811-2503 hereby constitutes and appoints Steven R. Lewis, Jr., any other member of the Boards who is not an interested person of the investment manager, and Scott R. Plummer or any one of these persons individually as her or his attorney-in-fact and agent to file and sign for her or him in her or his name, place and stead any Registration Statement on Form N-14 (including any and all amendments thereto) relating to the merger of RiverSource Core Bond Fund, a series of RiverSource Bond Series, Inc., into RiverSource Diversified Bond Fund, a series of RiverSource Diversified Income Series, Inc., and any other document, upon the advice of counsel, filed by RIVERSOURCE DIVERSIFIED INCOME SERIES, INC. with the Securities and Exchange Commission pursuant to the provisions of the Securities Act of 1933 and the Investment Company Act of 1940; and grants them the full power and authority to do and perform each and every act required and necessary to be done in connection therewith. Dated the 11th day of September, 2007. /s/ Kathleen A. Blatz /s/ Jeffrey Laikind - ------------------------------------- ---------------------------------------- Kathleen A. Blatz Jeffrey Laikind /s/ Arne H. Carlson /s/ Stephen R. Lewis, Jr. - ------------------------------------- ---------------------------------------- Arne H. Carlson Stephen R. Lewis, Jr. /s/ Pamela G. Carlton /s/ Catherine James Paglia - ------------------------------------- ---------------------------------------- Pamela G. Carlton Catherine James Paglia /s/ Patricia M. Flynn /s/ Alison Taunton-Rigby - ------------------------------------- ---------------------------------------- Patricia M. Flynn Alison Taunton-Rigby /s/ Anne P. Jones /s/ William F. (Ted) Truscott - ------------------------------------- ---------------------------------------- Anne P. Jones William F. (Ted) Truscott