And now Sears? Bloomberg reports that the Secret Service is investigating a possible security breach at the retailer. There's not much more to the story at this point, and so no way to tell whether this might be something on par with Target's breach. In a statement, Sears says it is "actively reviewing our systems to determine if we have been a victim of a breach," reports Fox Business. But it adds: "We have found no information based on our review of our systems to date indicating a breach." The Secret Service has been investigating the cyber-attacks on Target and other retailers such as Neiman Marcus that exposed customers' credit card data. If Sears joins the group, it won't help CEO Edward Lampert's turnaround efforts.