Top US officials involved in high-level trade negotiations with China emerged from two days of talks touting “substantial progress” and appearing to confirm that a deal between the two countries had been reached,

The White House said it was announcing a trade deal without providing any details. Representatives from the U.S. and China had been meeting in Switzerland.

The world’s two biggest economies agreed to a temporary rollback of most of their recent levies after negotiating in Switzerland over the weekend.