The international community has previously raised concerns about China's treatment of Uyghurs and other Muslim minorities. Human rights groups estimate that China has detained more than one million Uyghurs against their will in a network of what the state terms "re-education camps." Hundreds of thousands have reportedly been sentenced to prison terms. Xinjiang is home to approximately 12 million Uyghurs, mostly Muslim, who see themselves as culturally and ethnically close to Central Asian nations. China, however, has consistently denied all allegations of human rights abuses in Xinjiang.