Barnes & Noble Inc. said Tuesday that devices used by customers to swipe credit and debit cards have been tampered with in 63 of its stores in nine states.
The company warned customers to check for unauthorized transactions and to change their personal identification numbers, or PINs. It didn't say how many accounts may have been compromised.
The company warned customers to check for unauthorized transactions and to change their personal identification numbers, or PINs. It didn't say how many accounts may have been compromised.
But The New York Times, citing a high-ranking company official it did not name, reported that hackers had made unauthorized purchases on some customer credit cards.
The New York-based bookseller said in a statement Tuesday only one of the devices, known as PIN pads, was tampered with in each of the 63 stores including stores in Pennsylvania.
All the PIN pads in its nearly 700 stores nationwide were disconnected on Sept. 14 after the company learned of the tampering. Federal authorities are helping in its investigation.
The New York-based bookseller said in a statement Tuesday only one of the devices, known as PIN pads, was tampered with in each of the 63 stores including stores in Pennsylvania.
All the PIN pads in its nearly 700 stores nationwide were disconnected on Sept. 14 after the company learned of the tampering. Federal authorities are helping in its investigation.
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