Cargill Meat Solutions has sparked more E. coli fears in the US with a recall of over 800,000 lbs of frozen ground beef patties.

Just a day after Topps Meat Co., the second-largest supplier of hamburgers in the US, said it was being forced out of business after its own E. coli. scandal, Cargill said it was recalling some 844,812lbs of patties.

The recall came after health officials in the state of Minnesota found a preliminary link between four cases of E. coli and Cargill products bought at local Sam's Club stores.

"We are concerned that some consumers may still have the product sold at retail in their freezers," said Bill Rupp, president of Cargill Meat Solutions on Saturday (6 October). "We and Sam's Club are urging customers to return or destroy any American Chef's Selection Angus Beef Patties purchased in any of their stores since August."

The products subject to the recall were produced on 9-10 and 15-17 August and were distributed nationwide, Cargill said. Each package bears the establishment number "Est. 924A" inside the USDA mark of inspection.

Rupp said the company learned of the situation shortly before noon on Friday. Based on information from officials in Minnesota and at the US Department of Agriculture, the company investigated further and expanded the scope beyond Minnesota.

Cargill added that the extent of any contamination is unknown and that the undertaken recall was a "proactive and cautionary step".