"European law-enforcement officials uncovered a highly sophisticated credit-card fraud ring that funnels account data to Pakistan from hundreds of grocery-store card machines across Europe, according to U.S. intelligence officials and other people familiar with the case. Specialists say the theft technology is the most advanced they have seen, and a person close to British law enforcement said it has affected big retailers including a British unit of Wal-Mart Stores Inc. and Tesco Ltd."