A credit card fraud problem at Schnucks supermarkets has been traced to a "cyberattack," and the chain has taken steps to block unauthorized access in the future. Schnuck Markets Inc., based in the St. Louis suburb of Maryland Heights, in a news release said Saturday that a computer forensic firm it hired discovered a computer code was recording data from magnetic stripes on the back of payment cards. The company said the problem has been fixed. On March 15, the chain learned some customers had noticed unauthorized charges for credit cards they used at Schnucks. In some cases, transactions reached thousands of dollars. Authorities said many of the unauthorized charges were at out-of-state big-box stores.
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