China says it believes 432 babies across the country have been made ill with kidney stones after drinking milk powder contaminated with melamine.
The toxin was linked to the deaths and illness of thousands of pets in the United States last year. Sanlu Group, a dairy producer partly owned by New Zealand dairy giant Fonterra Co-operative Group, has been ordered to halt production after a preliminary investigation found its products were responsible. Nineteen people have been detained on suspicion of breaking food safety laws, and 78 have been questioned.
Sonia Legg reports.