An infection of deadly anthrax has been identified in beef in eastern Hungary and five people are being monitored in hospital for suspected symptoms of the disease, the country’s health authority said Friday. It said the disease was identified in frozen beef after two cattle were illegally slaughtered in a farm in Tiszafured, a town about 100 miles east of Budapest.

Officials said the five people hospitalized had probably contracted the disease during illegal slaughtering. Some of the beef had been transported to a company that operates workplace kitchens.