The U.S has barred the importation of merchandise from a Chinese sportswear company, after an American customs investigation revealed the company uses North Korean labor in its supply chain.

U.S. Customs and Border Protection (CBP) announced the move against Li-Ning Company Ltd. on Tuesday, citing the Countering America’s Adversaries Act that prohibits the entry of goods produced wholly or in part by North Korean nationals anywhere in the world.

The law “is yet another tool in CBP’s trade enforcement arsenal that allows us to uphold the fundamental value of human dignity and to ensure the goods that enter the United