Giant US retailer Target said Friday that up to 110 million customers have had their personal data stolen in a data breach, sharply raising its initial estimate. The number of people affected represented one in three Americans, and the scope of the information stolen was much broader than originally thought, Target admitted. Target initially reported on December 19 that payment card data of some 40 million customers had been obtained by hackers during the year-end holiday shopping season. The stolen information included credit and debit card data, customer names and PIN (personal identification data) numbers.