According to the outgoing Secretary of State, Michael Pompeo,
Our exhaustive documentation of the PRC’s actions in Xinjiang confirms that since at least March 2017, local authorities dramatically escalated their decades-long campaign of repression against Uyghur Muslims and members of other ethnic and religious minority groups, including ethnic Kazakhs and ethnic Kyrgyz. Their morally repugnant, wholesale policies, practices, and abuses are designed systematically to discriminate against and surveil ethnic Uyghurs as a unique demographic and ethnic group, restrict their freedom to travel, emigrate, and attend schools, and deny other basic human rights of assembly, speech, and worship. PRC authorities have conducted forced sterilizations and abortions on Uyghur women, coerced them to marry non-Uyghurs, and separated Uyghur children from their families.
[…]
“…the People’s Republic of China (PRC), under the direction and control of the Chinese Communist Party (CCP), has committed crimes against humanity against the predominantly Muslim Uyghurs and other members of ethnic and religious minority groups in Xinjiang. These crimes are ongoing and include: the arbitrary imprisonment or other severe deprivation of physical liberty of more than one million civilians, forced sterilization, torture of a large number of those arbitrarily detained, forced labor, and the imposition of draconian restrictions on freedom of religion or belief, freedom of expression, and freedom of movement. The Nuremberg Tribunals at the end of World War II prosecuted perpetrators for crimes against humanity, the same crimes being perpetrated in Xinjiang.”