A man has killed his wife and four children and surrendered himself to Kianyaga police station.
Rukenya assistant chief Kenneth Murimi said the bodies were still at the scene when police visited.
The man, 35-year-old Paul Njuki, is still being held by the police as investigations continue.
The victims have been identified as wife Millicent Muthoni, 38, Nelly Wawira, 13, Gifton Bundi aged seven, five-year-old Sheromit Wambui and Clifton Njuk aged one.
Police visited the scene at around 2230hrs and found the scene intact.
The bodies were in their beds, with multiple stab wounds on the heads.
Police said one murder weapon was recovered. The suspect is yet to lead the officers to where he claims he threw the axe he says he used to attack his family.
Efforts to remove the bodies to Kerugoya county mortuary are ongoing but the heavy rains made the roads impassable.
At some point, police said, the vehicles ferrying the bodies were stuck.