Nightly News | January 11, 2014
>>> one day after customers were hit with theft on their personal data, another well-known retailer says that thieves may have stolen debit and credit card information from their customers, we get more from nbc's kristen dahlgren.
>> reporter: first, a number of target shopper, now, an unknown number at neiman marcus , they say they were hacked over the holidays. neiman says it was informed by a credit card processer in december and is working with the u.s. secret service to work with the affected customers.
>> you may even be one of those people and not even know it.
>> reporter: this man ordered a debit card after the breach, now he worries it was not enough.
>> it scares me, now they could have given out more information.
>> reporter: e-mails, home addresses, phone numbers that scammers could use to steal an identity, opening cards, loans or getting access to bank accounts .
>> we don't know how far this could go or what could be the scam they want to get you involved in. so the best rule of thumb just don't click on any e-mail that you're not sure about.
>> reporter: target has not said how the information was stolen from the store or internet systems, but they say there are things customers should do.
>> if you have your receipts from the last couple of months of shopping, save that, make sure you save that receipt and match them with the bills you get from the credit card companies. make sure if there are any fraudulent charges you alert the credit card company right away. and the other thing you want to do is get a free copy of your credit report .
>> reporter: target is offering free credit monitoring for all customers regardless of when you shopped. but for raoul rojas, it is just the beginning.
>> i don't think it will just be a year that people are trying to use information.
>> reporter: millions wonder where that information now lives and how much more in what is being called the biggest data breach in history could cost. kristen