Sears investigating possible security breach

Sears said Friday it has launched an investigation to determine whether it was the victim of a security breach, following Target's revelation at the end of last year that it had suffered an unprecedented cyber attack.

"There have been rumors and reports throughout the retail industry of security incidents at various retailers, and we are actively reviewing our systems to determine if we have been a victim of a breach," a Sears spokesperson told CNBC Friday.

"We have found no information based on our review of our systems to date indicating a breach."

(Read more: Target's biggest issues)

Daniel Acker | Bloomberg | Getty Images

The company did not say when the operator of Sears department stores and Kmart discount stores had begun the investigation or provide other information about the probe.

Sears operates nearly 2,500 retail stores in the United States and Canada.

Bloomberg News reported on Friday that the U.S. Secret Service was investigating a possible secret breach at Sears, citing a person familiar with the investigation. The report did not identify that source by name.

The Bloomberg report said that its source did not disclose details about the scope or timing of the suspected breach.

A spokesman for the U.S. Secret Service declined comment on the situation.

The Secret Service is leading the U.S. government's investigation into last year's attack on Target, which the company has said led to the theft of some 40 million payment card numbers as well as another 70 million pieces of personal data.