A drug with the potential to cause cancer in humans might have entered the food chain through horse meat slaughtered in UK abattoirs, Labour has claimed.
Shadow environment secretary and Wakefield MP Mary Creagh told the Commons she had evidence that "several" horses slaughtered in the UK last year tested positive for the carcinogen phenylbutazone.
It's after a Dalepak factory in North Yorkshire was implicated in the horse meat in beefburgers scandal last week. Bosses at the ABP foods plant in Leeming bar insisted only a trace amount was found in their products.
Horse DNA has been found in some beef burgers produced at a factory in Northallerton. Traces of horse meat were discovered during testing by The Republic of Ireland's Food Safety Authority.
The burgers were produced at the Dalepak Hambleton plant, and two other factories in Ireland.
Tesco, Lidl, Aldi, Iceland and Dunnes Stores say they are removing the products from their shelves immediately.
The Irish Food Safety Authority says the meat poses no health risk but raises concerns about food traceability.