BOSTON (AP) — Neiman Marcus says that a security breach last year may have affected about 1.1 million cards.

The high-end department store chain says that malicious software attempted to take customers’ credit and debit card information from July 16 to Oct. 30.

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Neiman Marcus says Visa, MasterCard and Discover have found 2,400 cards of Neiman Marcus and Last Call customers that were used fraudulently. Last Call is Neiman Marcus’ clearance chain.

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Neiman Marcus Group Ltd. reiterated in a post on its website Wednesday night that social security numbers and birth dates were not stolen and customers who shopped online were not affected. The Dallas-based company says the investigation is ongoing.

Target Corp. also suffered a security breach, during the holiday shopping season. Hackers stole about 40 million debit and credit card numbers.

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