TJX computer breach may have started earlier

TJX Cos., a discount retailer that operates the T.J. Maxx and Marshalls stores, said an unauthorized intrusion into its computer systems might have occurred beginning in July 2005, almost a year earlier than the company previously believed.

Credit and debit card data from transactions in the U.S., Puerto Rico and Canada between January 2003 and June 2004 may have been compromised, Framingham, Mass.-based TJX said.