Authorities in Shanxi province have arrested seven people in the latest case of milk powder contamination, AP reported. The general manager of Jinfulai Dairy in Yangquan, Shanxi and six others were arrested after it was found that Jinfulai traded fresh milk for expired milk with high levels of the industrial chemical melamine. The company processed the expired milk into 26 metric tons of milk powder, which it then sold in several provinces under the "Sanlai" brand name. More than 300,000 children were sickened and six died in 2008 after consuming milk formula tainted with melamine.