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 Mary Creagh told the Commons she had evidence that "several" horses slaughtered in the UK last year tested positive for the carcinogen phenylbutazone.
Agriculture minister David Heath told the Commons the Food Standards Agency checks all meat to ensure it is fit for human consumption.
He told MPs:
Where positive results of phenylbutazone are found the FSA investigates and takes follow-up action to trace the meat.
More top news
Spencer Stone, one of the three American men who thwarted the French terror attack in August, has been stabbed repeatedly.
The 16-year-old's stepbrother and his girlfriend are accused of murdering her and then cutting her body up.
A top film producer is at the centre of an international manhunt after he disappeared, allegedly taking £45m of investment with him.