A company that owns a coal mine in Virginia has furloughed 600 workers until the end of the year. The reported reason behind the move is the trade war between the U.S. and China.

The Bristol Herald Courier reported Monday that Coronado Coal idled its mining facility in Buchanan County on Dec. 16.

A state agency that oversees mining in Virginia said the company cited the trade war. But Coronado did not specify what it was looking for between China and the U.S.

Tensions appear to have eased after China said it plans to buy $200 billion worth of American goods and services.