South Korea's food watchdog has ordered China-manufactured snacks from Nestle SA and Mars Inc to be taken off shelves after detecting melamine in their samples, it said on Saturday, according to reuters. The Korea Food and Drug Administration (KFDA) said 2.38 parts per million (ppm) and 1.78 ppm of the substance were found in M&M's milk chocolate snack and Snickers peanut Fun Size, both produced by Mars and manufactured in China. "We are urgently recalling the products due to melamine detection," KFDA said in a statement. Kit Kat bars from Nestle were also found carrying 2.89 ppm of melamine, bringing the total number of melamine-detected items to 10 in Seoul. Melamine, widely used in kitchen utensils, can pose serious health risks if consumed in large quantities. At least four children in China died after drinking tainted infant milk formula last month. KFDA said it is currently examining 428 processed products manufactured in China. It had completed checks on 288 items as of Saturday.