BEIJING — A bus overturned on a highway and was hit by an oncoming truck in eastern China on Friday, killing at least 10 people, officials said.

A number of others were also injured, the government of Wuhu city in Anhui province said. The crash was under investigation.

State broadcaster China Central Television said the bus overturned into the opposite lane and was hit by the truck.

It wasn’t clear how many people were aboard the two vehicles.

Photos circulating in social media showed rescuers in the rain on a wet road with the bus resting on its side.

Road accidents in China are often caused by poor driving, inadequate maintenance, overloading and dangerous mountain roads. The number of motorists also has been rapidly increasing, with the rise of the country’s middle class.