Oct 21 (Reuters) - Staples Inc said late Monday evening it is investigating a possible breach of payment card data and has contacted law enforcement about the matter, making it the latest U.S. retailer to become a possible victim of a cyberattack.

"Staples is in the process of investigating a potential issue involving credit card data and has contacted law enforcement," company spokesman Mark Cautela said in a statement.

"We take the protection of customer information very seriously, and are working to resolve the situation," he said. "If Staples discovers an issue, it is important to note that customers are not responsible for any fraudulent activity on their credit cards that is reported on a timely basis."

The office supply retailer disclosed the investigation after security reporter Brian Krebs reported on his blog Krebsonsecurity.com that several banks have identified a pattern of payment card fraud suggesting that several Staples stores in northeastern United States had succumbed to a data breach.

(Reporting by Jim Finkle and; Supriya Kurane; Editing by Edwina Gibbs)