Even as more nations around the world imposed curbs on Chinese imports following the tainted milk scandal, authorities in China decided to withdraw one of the country's best-known candy brands from the market.
The makers of White Rabbit candy -- a hugely popular candy presented to US president Richard Nixon on his landmark 1972 trip -- announced on Friday it was halting domestic sales after its products were found to contain melamine.
It came as the European Union joined a growing list of nations and regions to ban or restrict imports of milk products from China, leaving Asia's biggest exporter facing one of the biggest challenges ever to its reputation.
White Rabbit producer Guanshengyuan had previously recalled exports after Singapore authorities said they had tested positive for melamine, a chemical which is normally used to make plastic, a spokesman said.
"We've recalled white rabbit candy for export overseas, and we are temporarily halting domestic sales," said the spokesman, who declined to be named.
The decision is the latest twist in an embarrassing scandal that has so far sickened 53,000 Chinese children, killing four, after they drank contaminated milk.
Singapore's Agri-Food and Veterinary Authority said last Sunday that White Rabbit samples imported from China were contaminated with melamine, which can make milk appear richer in protein.
The Shanghai Entry-Exit Inspection and Quarantine Bureau is conducting its own tests on the candies, but the results have yet to be released, the official Xinhua news agency reported.