SHANGHAI  More contaminated Chinese candy was discovered in the United States on Wednesday, this time in Connecticut, where consumer protection officials issued a public warning against eating the sticky sweet.

In China, meanwhile, a couple filed a lawsuit against the company at the center of the tainted dairy scandal despite efforts by authorities to keep the issue out of the courts.

The discovery announced Wednesday involved the White Rabbit Creamy Candy brand, which is sold in 50 countries but has already been recalled from stores in Britain and many Asian countries. Jerry Farrell Jr., Connecticut’s consumer protection commissioner, announced that contaminated candy had been found at two stores in New Haven, one in West Hartford and one in East Haven. In each case, tests found traces of an industrial additive, melamine, in the candy.

“We’re concerned, obviously, there may have been bags sold of these before we got to them,” Mr. Farrell said on Wednesday, according to The Associated Press.