China's state news agency says police have arrested six people and detained 41 others over the distribution of milk powder tainted with the same chemical that killed infants in a 2008 scandal.
The Xinhua agency says three of the six were employees of a factory that last month was found to have shipped milk powder contaminated with melamine.
Melamine is used to make plastics but has been widely and illegally used in China to bulk out dairy products and give the appearance of higher protein content.
