Police and the Food Standards Agency have raided a slaughterhouse in Todmorden and in Wales as part of the probe into horse meat in processed burgers.
The Food Standards Agency has given the following statement:
"As part of its ongoing investigation into the mislabelling of meat products, the FSA and police today entered two meat premises, one in West Yorkshire and the other in West Wales.
"I have suspended both plants immediately so they can no longer supply food on to the market, while our investigations continue.
The FSA has suspended operations at both these plants. Both West Yorkshire and Dyfed-Powys police have entered the premises with the FSA. The FSA has detained all meat found and seized paperwork, including customer lists from the two companies.
Andrew Rhodes, FSA Director of Operations, said: 'I ordered an audit of all horse producing abattoirs in the UK after this issue first arose last month and I was shocked to uncover what appears to be a blatant misleading of consumers. I have suspended both plants immediately while our investigations continue.’
Environment Secretary Owen Paterson said: 'This is absolutely shocking. It’s totally unacceptable if any business in the UK is defrauding the public by passing off horsemeat as beef. I expect the full force of the law to be brought down on anyone involved in this kind of activity.'