According to CS Kindiki followers of Pastor Paul Mackenzie who changed their minds after they started to starve were killed.
Kindiki said Mackenzie had hired armed criminals to supervise the followers who were starving.
"In the event somebody would change their mind, they would be hit by a blunt object or strangled to death by the supervisors," he said.
The CS told senators most victims died of starvation but a good number died of injuries inflicted on them by blunt objects or lack of oxygen.
Kindiki appeared before the Senate Ad hoc Committee on the Proliferation of Religious Organisations on Friday.
Kindiki further revealed that his officers had identified other mass graves.
"Satellite images have shown us there are more mass graves. We are sure of 10 mass graves," he stated.
He expressed confidence that all bodies will be recovered and those still alive will be rescued. He said Kenyans will be told everything once all is done.
Kindiki orders evacuation of 200 families downstream Kijabe by 6 PM