Hong Kong's food safety watchdog says that two Cadbury chocolate products sold there by British sweetmaker contained dangerous levels of melamine.The city's Centre for Food Safety said in a statement that the two products - Dairy Milk Cookies Chocolate and Dairy Milk Hazelnut Chocolate, both sold in five-kilogram bulk packs - contained unacceptable levels of the toxic chemical.Both products were among 11 recalled by Cadbury in Hong Kong, Taiwan, and Australia last week, after the company said its own tests had "cast doubt on the integrity" of some items made at its Beijing plant.The Centre said six other Cadbury products were tested and found to be safe for