Wal-Mart ( WMT) said Monday that U.S. same-store sales for April are tracking near the low-end of its positive 4% to 6% guidance. The company cited one less Easter week and tough comparisons with the prior-year period. This is the second week in a row that the company has guided April sales to the low end of its outlook. The April results would compare with a same-store sales rise of 5.1% in April 2003. The strongest categories for the U.S. in the week ended April 23 were electronics, food, lawn and garden, pet supplies and sporting goods. The North and the Northeast were the strongest regions for the week. Wal-Mart will release results for the four weeks ending April 30 on May 6. Shares of the company were off 6 cents at $58.91 in Monday morning trading.