TO BE RELEASED: Monday, May 5, 1997 S&T Bancorp Finalizes Peoples Bank of Unity Merger Indiana, Pennsylvania (Nasdaq NMS: STBA) - Officials of S&T Bancorp, Inc. announced today that the merger of Peoples bank of Unity into its principal subsidiary, S&T Bank, has been finalized. Peoples Bank of Unity, with assets of $288 million, operated six offices in the eastern suburbs of Pittsburgh, including Plum Borough, Penn Hills, Monroeville, Oakmont and Holiday Park. All of these offices will now operate under the S&T Bank name. According to Robert D. Duggan, Chairman and chief executive officer of S&T Bancorp, "We understand the importance of providing personalized services to customers and we are committed to providing former Peoples Bank of Unity customers with exceptional service and to making even more financial products and services available to them." Some of the new services available to former Peoples Bank of Unity customers include trust and investment management, discount brokerage as well as a full array of commercial lending services including cash management and commercial loans. S&T Bank also offers a wide range of products and services designed to meet the financial needs of individual consumers. Mr. Duggan added, "This merger is consistent with our strategic plan to expand S&T's presence further into Allegheny County. Peoples Bank was a high performing community bank with a reputation for exceptional customer service." With the acquisition of Peoples Bank of Unity, S&T Bancorp's assets increased to approximately $1.8 billion. Headquarted in Indiana, PA, S&T Bank, the principal subsidiary of S&T Bancorp, Inc., operates 39 offices within Allegheny, Armstrong, Clearfield, Indiana, Jefferson and Westmoreland counties. S&T Bancorp stock trades on the Nasdaq National Market System under the symbol STBA.