BEIJING — The Chinese government Friday denounced a U.S. law that restricts imports from Xinjiang as a violation of international law.

President Joe Biden signed the measure Thursday amid mounting tension, including appeals by activists for a boycott of February’s Winter Olympics in Beijing. It prohibits U.S. businesses from importing goods from Xinjiang unless they can be proven not to have been made by forced labor.

Foreign governments and researchers say more than 1 million Uyghurs and other minorities have been confined in camps in Xinjiang in China’s northwest. Chinese officials are accused of using forced abortions, forced labor and mass indoctrination.

Chinese officials reject the accusations and say the camps are meant for job training and to combat radicalism.