Turkey and Britain voiced concern on Monday at China's alleged mistreatment of Uighurs and other Muslims in its Xinjiang region, with Turkish Foreign Minister Mevlut Cavusoglu calling on Beijing to protect freedom of religion and cultural identity.

The issue came up as U.N. Human Rights Council opened its main annual session. Diplomats and activists say China has lobbied hard to avoid scrutiny over its policies in Xinjiang and other rights issues at the four-week meeting.

Western countries are looking to Turkey and other members of the Organization of Islamic Cooperation (OIC) to spotlight what rights groups call internment camps in Xinjiang, a remote western region of China. China says they are re-education and training facilities that have been highly successful in stopping attacks previously blamed on Islamist militants and separatists.