GENEVA (Reuters) - The United Nations investigator on religious freedom said on Tuesday he has asked China to let him visit its Xinjiang region where some 1 million ethnic Uighurs and other Muslims are in facilities activists call mass detention camps.

Facing growing international opprobrium for what it calls re-education and training centers, China has stepped up diplomatic efforts to fend off censure.

Reuters - U.N. religious freedom expert seeks visit to China's Xinjiang