A spokesman from the Department for Environment, Food and Rural Affairs (Defra) said they were working with the Food Standards Agency to investigate how traces of horse DNA made their way into beef burgers sold in supermarkets across the UK.
The spokesman said the investigation will find the source of the contamination, and "appropriate enforcement action" will be taken.
Consumers should have confidence that food is exactly what it says on the label and there are strict rules requiring products to be labelled accurately.
Defra is working with the Food Standards Agency to urgently investigate how a number of beef products on sale in the UK and Republic of Ireland were found to contain horse and pig meat.
The investigation will trace the meat back to its source to find the cause of the contamination and any appropriate enforcement action will be taken.