Ground beef patties produced by Topps Meat Company that were recalled for possible E. coli contamination in September are still on store shelves.

Over the past few weeks, 141 boxes of Topps burgers have been found at 12 stores, all in northern New Jersey except for one in Gloucester City in Camden County, according to the state Division of Consumer Affairs.

At least six people in New York had become ill with E. coli infections after eating Topps Meats’ ground beef, and the investigation into these illnesses by the New York Department of Health and the Centers for Disease Control and Prevention (CDC) was what led to the resulting recall.

Topps Meat Company of Elizabeth, New Jersey, recalled 21.7 million pounds of frozen ground beef products that may have been contaminated with E. coli O157:H7. The CDC announced that 38 confirmed illnesses had been tied to the outbreak in 9 states: Connecticut, Florida, Indiana, Maine, New Jersey, New York, Ohio, and Pennsylvania.