Four people died on Wednesday night while others sustained injuries in a road accident on the Eldoret-Webuye road.
Witnesses said that a truck driver lost control and rammed a 14-seater North Rift Sacco Matatu.
Three passengers who were in the matatu died on the spot while the driver succumbed to injuries while undergoing treatment.
Kakamega County Police Commander Bernard Muli said his officers are in pursuit of the truck driver who fled after the accident.
He urged drivers who operate at night to ensure they adhere to traffic rules.