Tianshan and Sayibak districts of Urumqi, capital of northwest China's Xinjiang Uygur Autonomous Region, raised their COVID-19 risk levels from low to high on Sunday, while three other districts raised their levels to medium.

Xinjiang reported 13 new cases on Saturday, all from Urumqi. The total number of cases in the region reached 106 on Saturday, according to local health authorities.

Urumqi on Sunday finished nucleic acid testing for everyone under centralized or home medical quarantine, said a local health official while advising residents to stay calm.