Nairobi (Agencies): At least 40 people were killed in a bus accident in western Kenya early Wednesday, police said.

“Reports reaching me are that more than 40 people died on the spot but it could be more because the roof of the bus was ripped off,” Rift Valley Provincial Traffic Officer Zero Arome told media.

Another traffic police officer who spoke from the scene, in western Kericho county, placed the number at 42.

“We have 42 people dead, but we are still at the scene,” he said.

According to police, the bus was travelling from Nairobi to the western town of Kakamega and was carrying 52 passengers.

The Kenyan Red Cross wrote on Twitter that the bus had overturned. However, more details on the cause of the accident were not immediately available.

Official statistics show that around 3,000 people die annually in road accidents in Kenya , but the World Health Organization estimates the figure could be as high as 12,000.