The accident occurred on Saturday morning in the Chinese city-county of Yixing, when a bus carrying 69 passengers swerved into oncoming traffic and collided with a truck.
A preliminary investigation determined the accident was caused by a flat tire on the left front wheel of the bus, the bureau said in a statement.
Nine people were seriously injured, 26 were slightly hurt and one was discharged from the hospital. Deadly road accidents are common in China, where traffic regulations are often flouted or go unenforced.
58,000 people were killed in accidents across the country in 2015, according to the last available figures.UNI