Target and Neiman Marcus may not be the only big American retailers victimized by hackers.

"I think it’s something that's going to happen more and more at all the stores," Ginger Vollmer of Dearborn told Ruth to the Rescue last week. And, she might be right!

Sources are telling the news service Reuters that three other big-name stores may have been hit during the busy holiday season. However, those retailers have not been publicly identified yet. While the investigation continues, Reuters says the same hackers might be responsible for hitting several stores and the ring leaders might be based in eastern Europe, where many cyber security schemes have been generated.

Last week, Target confirmed up to 110 million consumers may have had some of their personal information stolen.

"I shop probably 3 times a week at Target, and as soon as I heard I checked my credit cards," said Trisha Habucke of Birmingham as she walked out of the Target in Allen Park.

In December, Target reported the personal data of 40 million customers was stolen. At first, the retailer said only debit and credit card information was taken between Nov. 27 and Dec. 15, the beginning of the very busy Christmas season. A week later, the retailer admitted hackers has also taken "strongly encrypted" personal identification numbers when they tapped into the retailer's systems.

Target has also confirmed up to another 70 million customers may have been affected, although there could be some overlap between the two groups. The store stresses both problems stem from the same breach, covering the same time period.

On Jan. 13, Target ran full page apologies to customers in newspapers. Target's CEO Gregg Steinhafel is reassuring customers they will not be held liable for fraudulent charges. The ad also says measures have been taken to protect your personal information, and the breach is being investigated.

Target has also posted the information about a year of free credit monitoring, which it promised to do last week. Follow this link if you're interested in signing up.