CONTACTS:      Ken Preston
                         Shirley Hosoi            Josh Pekarsky
                         First Interstate Bank    Kekst and Company
                         (213) 614-3043           (212) 593-2655

                                             FOR IMMEDIATE RELEASE

          FIRST INTERSTATE WELCOMES ASSEMBLY BANKING AND FINANCE
          COMMITTEE HEARING

          --"CALIFORNIANS SHOULD BE INTENSELY CONCERNED ABOUT THE
          CHILLING EFFECTS OF A WELLS FARGO TAKEOVER OF FIRST
          INTERSTATE"--

          LOS ANGELES, CA, January 10, 1996 -- First Interstate
          Bancorp (NYSE: I) today applauded the decision of the
          California State Assembly Banking and Finance Committee
          to hold a hearing to thoroughly examine the repercussions
          of Wells Fargo's hostile takeover proposal for First
          Interstate as compared to the friendly merger agreement
          already entered into with First Bank System with the full
          support of First Interstate's Board of Directors.

          William E.B. Siart, chairman and CEO of First Interstate,
          said: "Wells Fargo's reckless and ill-conceived takeover
          proposal poses serious threats to California, its
          citizens, small businesses and communities.  At stake is
          a vibrant banking environment and the continued
          availability of vital and competitively-priced banking
          services to small business, middle market companies and
          individuals who depend greatly on full-service branches. 
          Add to that the massive job losses that would hit our
          state and we think Californians should be intensely
          concerned about the chilling effects of Wells Fargo's
          takeover proposal."

          Last week, the Federal Reserve Board announced hearings
          of its own, to be held jointly in Los Angeles and San
          Francisco on January 22 and 23.

                                     ###

          The participants in this solicitation include First
     Interstate Bancorp ("First Interstate") and the following
     directors:  John E. Bryson, Edward M. Carson, Dr. Jewel Plummer
     Cobb, Ralph P. Davidson, Myron Du Bain, Don C. Frisbee, George M.
     Keller, Thomas L. Lee, Harold M. Messmer, Jr., Dr. William F.
     Miller, William S. Randall, Dr. Steven B. Sample, Forrest N.
     Shumway, William E. B. Siart, Richard J. Stegemeier and Daniel M.
     Tellep.  Employee participants include David S. Belles, Executive
     Vice President and Controller; William J. Bogaard, Executive Vice
     President and General Counsel; Theodore F. Craver, Jr., Executive
     Vice President and Treasurer; Daniel R. Eitingon, Executive Vice
     President, Technology Banking; Gary S. Gertz, Executive Vice
     President and General Auditor; Lillian R. Gorman, Executive Vice
     President, Human Resources; Robert E. Greene, Executive Vice
     President and Chief Credit Officer; Steven L. Scheid, Executive
     Vice President, Financial Planning and Analysis; Richard W.
     Tappey, Executive Vice President, Administration; David K.
     Wilson, Executive Vice President and Senior Credit Review
     Manager; James J. Curran, Chief Executive Officer, Northwest
     Region;  Linnet F. Deily, Chief Executive Officer, Texas Region;
     John S. Lewis, Chief Executive Officer, Southwest Region; Bruce
     G. Willison, Vice Chairman and Chief Executive Officer,
     California Region; Shirley Hosoi, Senior Vice President,
     Corporate Communications; Christine McCarthy, Executive Vice
     President, Investor Relations; Mariann Ohanesian, Vice President,
     Investor Relations; Kenneth W. Preston, Vice President, External
     Communications; and Shiromi D. Vethamani, Assistant Vice
     President, Investor Relations.  All such persons and those listed
     below, in the aggregate, are deemed to own beneficially less than
     2%, and no participant individually owns more than 1%, of the
     outstanding shares of First Interstate's common stock.
     First Bank System, Inc. ("FBS"), Eleven Acquisition Corp., a
     wholly owned subsidiary of FBS ("FBS Sub"), and First Interstate
     have entered into an Agreement and Plan of Merger, pursuant to
     which FBS Sub will merge with and into First Interstate with
     First Interstate being the surviving corporation (the "Merger"). 
     At the effective time ("Effective Time") of the Merger, pursuant
     to the Merger Agreement, FBS will change its name to First
     Interstate Bancorp ("New First Interstate").  Mr. Siart, who is
     Chairman and Chief Executive Officer of First Interstate, will
     become President and Chief Operating Officer of New First
     Interstate.  In addition, although not specifically required by
     the Merger Agreement, it is anticipated that at New First
     Interstate, Mr. Willison will serve as Vice Chairman, Corporate
     Banking and Ms. Deily will serve as Vice Chairman, Retail
     Banking.  Under certain benefit plans, severance arrangements and
     other employment agreements maintained, or entered into, by First
     Interstate, certain benefits may become vested or accelerated in
     connection with the Merger with respect to Mr. Siart, other
     directors of First Interstate, Ms. Deily, Mr. Willison, and the
     other participants.  During the period commencing on the
     Effective Time and continuing for not less than six years
     thereafter, New First Interstate will, to the fullest extent
     permitted under applicable law, have certain indemnification
     obligations to the participants with respect to matters arising
     at or prior to the Effective Time in connection with the Merger. 
     First Interstate has absolute and sole discretion in designating
     10 of the 20 directors of New First Interstate.  First Interstate
     has not yet determined which other individuals it will designate
     to serve as directors of New First Interstate.  For further
     description of the foregoing interests, see the Schedule 14D-9,
     dated and filed with the Securities and Exchange Commission on
     November 20, 1995, as thereafter amended, including the exhibits
     thereto.