SPRINGDALE, Ark. (AP) — Tyson Fresh Meats Inc. recalled more than 40,000 pounds of ground beef Friday after samples tested at a Sherman, Texas, plant showed signs of E. coli contamination in meat shipped to Wal-Mart stores in 12 states. No illnesses had been reported. Springdale-based Tyson Foods Inc. said the recall is not related to contaminated ground beef distributed by California-based United Food Group LLC. The recalled products were sent to Wal-Mart stores in Alabama, Arkansas, Colorado, Kansas, Kentucky, Louisiana, Mississippi, Missouri, New Mexico, Oklahoma, Tennessee and Texas, Tyson said.