ONTARIO, Calif. (7/14/08)--CO-OP Financial Services says its credit union members' ATM personal identification numbers (PIN) codes are safe and were not affected in a recent breach of ATMs inside 7-Elevens. "To the best of our knowledge, no CO-OP credit union members were impacted or compromised by the Citibank PIN breach," said CO-OP Financial Services CEO Stan Hollen in a statement on its website. The statement was in response to reports that hackers broke into Citibank's ATM network inside 7-Elevens between October 2007 and March 2008. They allegedly stole consumers' PIN codes. CO-Op Financial Services and its ATM network, CO-OP Network, have been partners with 7-Eleven stores and network processor Cardtronics for more than two years. In May, they announced deposit-taking ability was available in ATMs at more than 2,200 of the stores, which meant 26 million credit union members with the CO-OP Network cards could make deposits in the machines in 12 states. Hollen said CO-OP would continue to monitor the situation closely and would inform members "immediately" if any other news surfaced.