Horsemeat scandal: Dutch uncover large-scale meat fraud
10 April 2013 Last updated at 22:44 BST
Some 50,000 tonnes of meat supplied by two Dutch trading companies and sold as beef across Europe since January 2011 may have contained horsemeat.
The meat is being recalled where possible, the Dutch authorities say.
There was no evidence that the meat was a threat to human health, the Netherlands Food and Consumer Product Safety Authority said.
In total, 132 companies in the Netherlands and some 370 more around Europe are affected by the discovery.
Matthew Price reports.