Health officials said Wednesday that Japan has stopped imports of buffalo mozzarella made from Italy after high levels of dioxin, known to increase the likelihood of cancer, were reported in the cheese.

Italian authorities are investigating whether feed given to buffalo herds around the city of Naples was contaminated, possibly made by Naples Mafia or Camorra involved in illegal waste disposal.

A Japanese health ministry official has ordered a suspension of the cheese until accurate information is obtained about the contamination. "If we could be provided with the names of these firms, we could again allow cheese from the other producers to enter the country", he said.

Buffalo mozzarella is best known as a perfect ingredient for dishes such as pizza, pasta, vegetables and tomatoes. Buffalo mozzarella costs at least twice as much as mozzarella made with cow's milk.