A bodaboda rider identified as Mr Geoffrey Aroni is accused of stabbing his girlfriend to death before stabbing himself with the same knife in Kisii County.
The 24yr old killed his girlfriend Christine Nyananga who happens to be his counsin.
Neighbors said that they heard them fighting in their house and then reported the incidence to the police.
They said that they went to the house only to find a pool of blood and the two bodies lying on the floor.
"I immediately called the police who rushed to the scene,” said one of the neighbors.
Mr Ben Ogango, a relative to the man, said that the two had been on and off for a long time despite having been warned against the affair and that earlier on Aroni had called him and asked him to look after their daughter.
"The man called me and told me to take care of his daughter. I am shocked and can't believe he had to do this,” he said.
The two bodies were taken to the Kisii Teaching and Referral Hospital.
Kisii County police commissioner Ms Agnes Mudambi has urged lovers in the county to solve their differences kindly, without fighting.
“We have many ways of solving disputes and fighting is not one of them, if one feels that he has been wronged it is better to report to us,” she said.