Two accidents in Kinungi and Mahi Mahiu trading centers have left 22 people injured with three admitted in various hospitals in critical conditions.
The Naivasha accidents have left three dead including a five year old boy.
In one accident,a bus heading to Western Kenya was traveling at a high speed before hitting a speed bump before veering off the road crashing on the roadside.
A boy was thrown out of the bus after the impact leaving score of people injured.
The driver of the bus fled the scene.
In the second accident,a matatu rammed into a lorry ferrying building materials in Mahi Mahiu.
According to an eyewitness,the matatu was overtaking a fleet of vehicles before ramming into the lorry.
The driver of the matatu died on the spot while another person died while receiving treatment in a private hospital in Mahi Mahiu.