Neiman Marcus, the upscale department store, was recently hacked. Details of the attack were not released, nor the extent of the hack.

"The security of our customers' information is always a priority and we sincerely regret any inconvenience," the retailer said. "We are taking steps, where possible, to notify customers whose cards we know were used fraudulently after purchasing at our stores."

A longer statement was provided:

"Neiman Marcus was informed by our credit card processor in mid-December of potentially unauthorised payment card activity that occurred following customer purchases at our Neiman Marcus Group stores.

We informed federal law enforcement agencies and are working actively with the U.S. Secret Service, the payment brands, our credit card processor, a leading investigations, intelligence and risk management firm, and a leading forensic firm to investigate the situation. On January 1st, the forensics firm discovered evidence that the company was the victim of a criminal cyber-security intrusion and that some customers’ cards were possibly compromised as a result.

We have begun to contain the intrusion and have taken significant steps to further enhance information security.

The security of our customers’ information is always a priority and we sincerely regret any inconvenience. We are taking steps, where possible, to notify customers whose cards we know were used fraudulently after making a purchase at our store."

Investigators say that the hacking of Neiman Marcus and Target have similarities. Similar malware and techniques were used to siphon the data.

Security techs saw a 2 million dump of credit cards on Jan. 4th, 2014.