China said on Monday it would welcome U.N. officials to its far western region of Xinjiang if they follow the proper procedures, amid global concern over Beijing's de-radicalization program there.

Foreign Ministry spokesman Lu Kang, asked at a regular briefing about reports that China had invited U.N. experts to Xinjiang, said that all parties, including the U.N., were welcome, as long as they respected appropriate travel procedures.

U.N. officials should also "avoid interfering in domestic matters" and adopt an objective and neutral attitude, he added.