NEW YORK - Target says up to 40 million card accounts may have been affected by a recent data breach.
This comes after the Secret Service announced Wednesday they were 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.
Customers who used a credit or debit card at Target between Nov. 27 and Dec. 15 may have been hacked, CNN reported.
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.