Beijing has banned high-risk people from leaving the Chinese capital and halted some transportation services to stop the spread of a fresh coronavirus outbreak to other cities and provinces.

China’s financial hub of Shanghai demanded some travellers from Beijing be quarantined for two weeks, as 27 new Covid-19 cases took the capital’s current outbreak to 106 since Thursday.

That makes it the most serious flare-up in China since February, stoking fears of a second wave of the respiratory disease which emerged in the central city of Wuhan late last year and has now infected more than 8 million people worldwide.

“Beijing will take the most resolute, decisive, and strict measures to contain the outbreak,” Xu Hejian, spokesman at the Beijing city government was quoted as saying by Reuters.