China reported 22 new coronavirus cases on Friday, the country’s National Health Commission (NHC) announced on Saturday.

Of the new cases, 16 were local infections found in the western region of Xinjiang, according to the NHC. The other six were imported.

Authorities are on high alert after a reemergence of the virus in Urumqi, Xinjiang’s capital, on Thursday. The region hadn’t reported any new local infections for months.

On Friday, the state-run Global Times reported that almost 90% of flights in Urumqi were canceled, after the city reported six confirmed cases.

China also reported 14 asymptomatic cases Friday, according to the NHC.