WASHINGTON (AP) — The top U.S. and South Korean trade envoys have broken off talks without resolving a crisis over the resumption of American beef shipments that has paralyzed South Korea's pro-U.S. government.

U.S. Trade Representative spokeswoman Gretchen Hamel said Sunday in Washington that South Korean Trade Minister Kim Jong-hoon is returning to his country. But she says officials will remain in contact. She says the two sides held "frank and candid discussions" Friday and Saturday, but that both sides need more time to look into technical issues.