U.S. officials have ordered a recall of 143 million pounds of beef produced by a California processor accused of violating food safety regulations, in the largest recall in U. S. history.

The U.S. Department of Agriculture announced Sunday the recall of frozen beef produced during the past two years by the Westland/Hallmark Meat Company.

Federal officials suspended operations at the plant last week after undercover video showed crippled and sick animals being shoved into the slaughterhouse by a worker on a forklift.

Regulations call for the removal from the food supply of cattle that are unable to walk because they carry higher risk for a number of diseases, including Mad Cow disease.

The USDA said it is extremely unlikely any of the sick animals at the plant had Mad Cow disease.

Some information for this report was provided by AP and Reuters.