Beijing's Changping District on Friday reported four positive cases of COVID-19, according to the district health commission.
The four people visited Ejina Banner (county) in north China's Inner Mongolia Autonomous Region on Oct. 12 and returned to Beijing on Oct. 16, the commission said in a statement.
They have been sent to a designated hospital for treatment. Epidemiological investigation and nucleic acid testing are underway.
Inner Mongolia Autonomous Region reported 15 locally transmitted confirmed COVID-19 cases from 10 a.m. Thursday to 7 a.m. Friday, with 14 cases detected in Ejina Banner, according to the regional health commission.