Oh boy: New reports from a Chinese watchdog agency have extended the melamine-tainted crisis to liquid milk. The agency claims that 10% of samples from Mengniu Dairy Group Co. and Yili Industrial Group Co. (China's two largest dairy companies) contained melamine. As of this morning, 18 people have been arrested in connection with the melamine-tainted baby formula that has caused the death of four infants and sickened 6,200 children. Melamine is believed to have been added to raw milk by suppliers and dairy dealers and then sold to the larger dairy companies. Many parents in China are confused about what formula is safe for their children after three of the major brands—Sanlu, Yili Industrial Group and Mengniu Dairy Co.—have all been recalled. [MSNBC]