Nearly 80 stores were hit. The grocery store chain says it now has the issue "contained and fixed." Schnuck's says someone put a code into the system which copied credit and debit card numbers. It also accessed expiration dates, but not names or addresses.
They say anyone using their card from December to March may be at risk, but customers should just watch for any suspicious charges. Schnuck's says it's contacted banks and credit unions but they still want customers to watch their accounts carefully. Sometimes hackers will save the stolen numbers and sell them in batches.