The bus overturned on an expressway in Guizhou province, a short assertion from the Sandu county police stated, with out mentioning any connection to quarantine.
The injured have been being handled, it stated.
Chinese language enterprise information outlet Caixin stated Sandu officers confirmed the passengers have been "epidemic-related folks" being taken from Guiyang, the provincial capital, to Lido county, which is about 200 kilometres southeast.
Guiyang reported about 180 new instances on Friday.
China has maintained a strict "zero-COVID" coverage that isolates contaminated folks and shut contacts to attempt to include the unfold of the illness.
The bus overturned about 2:40 am, in keeping with a web based report by an arm of the Guizhou Every day media group.
Following the accident, it stated that provincial leaders known as for an examination into the pandemic switch and isolation procedures.
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