OKLAHOMA CITY, Okla. – Sonic Corporation has confirmed to the Chicago Tribune, that the restaurant chain is investigating “unusual activity” on credit cards used at their locations.
According to the Tribune, the fast food chain said in a statement that its credit card processor told them about the incident last week and that it’s now “working to understand the nature and scope of this issue.”
The company did not disclose how many credit cards were potentially involved in the incident or when the incident took place.
According to Sonic’s website, the chain operates more than 3,500 Sonic restaurants in 44 states, including several in Colorado.
Sonic said that it is working with third-party forensic experts and law enforcement officials on the incident. The potential breach at Sonic was initially reported by Krebs on Security.
Last year Wendy’s announced that hackers were able to steal customers’ credit and debit card information at more than 1,000 of its U.S. locations.
Wendy’s said at the time that the hackers were able to obtain card numbers, names, expiration dates and codes on the card. Some customers’ cards were used to make fraudulent purchases at other stores.