Public Service Electric & Gas is warning its customers they may be affected by a potential data breach involving the systems of TIO Networks, a subsidiary of PayPal Holdings.

In a press release issued late yesterday afternoon, the state’s largest utility said it had been notified by PayPal that there was unauthorized access to the TIO Networks system that stores customer information.

TIO Networks, which was purchased by PayPal in July for $237 million, processed payments at automated kiosks in PSE&G’s walk-in customer service between 2012 and 2017. The company also facilitated payments PSE&G customers made at third-party locations, such as convenience stores that accept utility-bill payments.

Customer information for PSE&G’s approximately 2.5 million customers may have been exposed as a result of the suspected breach, according to TIO Networks. When the online payment company first disclosed the problem, it said the suspected breach affected 1.6 million customers. According to TIO Networks, 22,000 of the compromised accounts included customer bank account numbers and other financial data.

Customers who believe they may be affected or have questions should visit www.tio.com or call 1-800-436-7734 for more information. TIO Networks suspended operations on November 10 to protect customer information as part of an ongoing investigation into the breach.