NEW YORK (AP) - The Secret Service says it is investigating a credit- and debit-card data theft at Target stores.
Secret Service spokesman Brian Leary confirms the agency is investigating, but declined to provide further details.
Minneapolis-based Target Corp. did not respond to requests for comment. A MasterCard representative referred questions to Target.
Target has 1,797 stores in the U.S. and 124 in Canada.
A former Washington Post reporter who runs his own internet security website, KrebsOnSecurity, first broke the story about the breach.