Dairy Queen has become the latest victim of computer hackers bent on pilfering customers’ credit and debit card information.

The Edina, Minn.-based ice cream and fast-food chain confirmed Wednesday that “customer data at a limited number of stores may be at risk.”

The company didn’t disclose how many customers or how many stores were affected.

“We are gathering information from a number of sources, including law enforcement, credit card companies and processors,” Dairy Queen said in a statement.

Dairy Queen’s acknowledgment came after the website Krebs on Security, which is run by cybersleuth Brian Krebs, reported a possible breach at DQ. Citing unnamed sources, Krebs wrote that a pattern of fraud suggests some DQ stores were compromised as early as June.

Dairy Queen has several thousand stores in North America, and is owned by Warren Buffett’s Berkshire Hathaway.

In a statement, Dairy Queen said “the protection of customer data is a top priority for us and our franchisees, and we take it seriously.” The company said that it had been notified recently along with many other companies of a data breach due to the spread of “Backoff” malware.