A Government spokesman said schools and councils should be responsible for the food they serve:
Schools and councils have always been responsible for their food contracts.
We expect all schools to ensure they have rigorous procurement procedures in place.
If headteachers have any concerns they should contact their caterers or local authority immediately.
Earlier Downing Street had refused to comment on whether school dinners had been tested for horse DNA.
A leading food scientist says the rule change that sparked the horsemeat beef scandal affected lamb products too, and they should be tested.
Retailers and the Food Standards Agency held an emergency meeting today to decide how to proceed with the horsemeat scandal.
The government has called an emergency meeting with retailers and the Food Standards Agency to discuss the horsemeat scandal.