Gangsters raided a residential plot in Mai Mahiu, Naivasha, and slashed to death a son of a local trader and attacked several other tenants on Wednesday night.
One woman was raped during the 2 am attack. Five tenants, including three women, were left for dead after they were attacked using machetes.
The 10-member gang raided the house of 40-year-old Stephen Kariuki near Mai Mahiu town and seriously injured him.
Joseph Njoroge, a witness, said the gangsters turned their fury on neighbours who responded to Kariuki's distress call.
He said two men and three women who were seriously injured were rushed to Naivasha sub-County Hospital.
Area police commander Samuel Waweru confirmed the incident, adding that they were holding one suspect.