Two of the three men who were found separately killed and their bodies dumped by the road last week in Kirinyaga County had their genitals missing.
Their families said that the genitals of their relatives had been chopped off, raising suspicion that trade in sexual organs is rife in the county.
The killings caused panic among Difathas villagers.
Two of the victims, Mr Muchiri Mbute, 51 and Mr Francis Karanja, 27, had head injuries, while a third one who is yet to be identified was found dead with a rope around his neck.
“We were really shocked when we found that the body of Mbute had genitals missing,” said Mr Simon Ngari, Mr Mbute’s younger brother.
Mr Mbute, who was married with five children, was walking home on November 23 when he was hacked to death. His body was found the following day.
Mr Ngari said that the family discovered that his genitals were missing as he was being taken to the mortuary.
“Immediately we saw what had happened to our brother, we came to the conclusion that some people could be involved in selling human body parts,” he said.
And Mr Karanja, a casual worker, was returning to his employer’s home on Monday night after delivering milk to Difathas market when he was waylaid and beaten to death.
His family also claimed that his genitals had been removed by the unknown attackers.
“My son was brutally killed. What worries me most is that his private parts could not be found,” said Mr David Muturi.
County Deputy Police Commander Charles Ontita said he is aware of the claims, but said only a post-mortem examination would reveal the truth.
“Family members should be patient and stop spreading such serious claims until a post-mortem (exam) is performed on the bodies,” he said.
Villagers are living in fear of the gang that hides in the dark and strikes before retreating to its hideout.