The supermarket Aldi says that it will no longer sell beefburgers from a factory in North Yorkshire where some were found to contain horsemeat.
The chain tested burgers made at the Dalepak plant for sale in its stores in the UK.
Some of the samples tested positive for tiny amounts of horse and pig DNA.
The supermarket has suspended its contract with the supplier.
A drug with the potential to cause cancer in humans might have entered the food chain through horse meat, Labour has claimed.
Traces of horse DNA have been discovered in a beef burgers sold in supermarkets across the UK. A Tesco burger was found to be 29% horsemeat
A list of the beef burgers, sold in UK supermarkets, that were found to contain traces of horsemeat.