EXHIBIT 16.2 Office the Chief Accountant Securities and Exchange Commission 450 Fifth Street, N.W. Washington, DC 20549 May 21, 2002 Dear Sir/Madam: We have read Item 4 included in the Form 8-K dated May 20, 2002 of Warren Bancorp, Inc. filed with the Securities and Exchange Commission and are in agreement with the statements contained therein. Very truly yours, /s/ Arthur Andersen LLP ARTHUR ANDERSEN LLP cc: Mr. Paul M. Peduto, Treasurer Warren Bancorp, Inc. 5