Officials in the United States and South Korea say high-level talks about renewing American beef imports will continue.
The announcement comes hours after the U.S. Trade Representative's office said weekend talks in Washington had ended without a resolution and that South Korea's trade minister would return home.
The talks focus on the importation of U.S. beef from cattle younger than 30 months of age. South Korea has vowed not to allow the import of beef from cattle older than that. Scientists think infection levels of mad cow disease increase with age.
In South Korea, thousands of people have been protesting in Seoul, demanding that a beef import deal settled in April be renegotiated.
South Korea was the third-largest overseas market for U.S. beef until it banned imports after a case of mad cow disease was detected in 2003, the first of three confirmed cases in the United States.