Secret Service investigating possible data breach at Sears

The U.S. Secret Service is investigating a possible security breach at Sears Holdings Corp., after a series of cyber attacks on retailers that have exposed the credit-card data of millions of U.S. consumers, a person familiar with the investigation told Bloomberg.

The security review is still at an early stage as Verizon Communications Inc.’s digital forensics unit and the U.S. Secret Service sift through the company’s computer data to look for traces of hackers and the extent of any incursion, according to two people familiar with the matter.

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