Recently leaked documents that debunked the Chinese government’s dealing in autonomous Xinjiang region confirm human rights violations against Uighurs, the top U.S. diplomat said Tuesday.

“We’ve all seen the Xinjiang papers released in recent days. They detailed Chinese party’s brutal detention in systematic repression of Uighurs and other members of Muslim minority groups in Xinjiang,” State Secretary Mike Pompeo told a news conference.

Pompeo was referring to the so-called China Cables that were obtained by the International Consortium of Investigative Journalists (ICIJ), a U.S-based donor-funded reporting outlet.

Read more: Leaked docs confirm China rights breach of Uighurs: US