STEINBERG GROUP HAS FIVE PCT OF PIZZA INN <PZA> A group controlled by New York investor Saul Steinberg told the Securities and Exchange Commission it has acquired 168,500 shares of Pizza Inn Inc, or 5.02 pct of the total outstanding common stock. The group, which includes Reliance Financial Serivces Corp, a subsidiary of Reliance Group Holdings Inc <REL>, said it bought the stock as an investment. It said it might add to its stake or sell some or all of it. The Steinberg group said it bought the stock for 1.75 mln dlrs in open market purchases between April 13 and May 19 at prices ranging from 13.625 to 14.2661 dlrs a share.