Chinese authorities have seized tons of dairy products tainted with an industrial chemical linked to the deaths of six infants in 2008.
State-run news agency Xinhua says 64 tons of raw milk powder contaminated with melamine were confiscated at a dairy plant in China's northwest Qinghai province. Another 12 tons of processed milk powder products tainted with the chemical were also discovered at the plant.
Test samples of the milk powder showed it contained up to 500 times the maximum levels allowed.
Police have detained the owner and production director of the Qinghai factory.
A quality control official in Gansu province, where the tainted products were discovered, says it is possible traders had bought tainted milk that was supposed to be destroyed after the 2008 scandal.
Twenty-two Chinese dairy companies were found to have used melamine to boost protein levels in milk products. In addition to the six infants who died that year, another 300,000 were sickened.
Some information for this report was provided by AP, AFP and Xinhua.