Detectives are investigating an incident in which three members of a family died after consuming suspected bad food in Vihiga county.
The incident happened at Kapsolywa village in Banja location.
The victims were identified as Elijah Mwanga, 72, his wife Betty Mwanga, 60, and their son Francis Indeheli aged 15.
According to police, the three had consumed suspected poisoned food.
They complained of stomach pains and were taken to Vihiga county referral hospital on August 1, where they all died while undergoing treatment.
The bodies were moved to the same hospital mortuary awaiting a postmortem examination.
The autopsy will tell what caused the deaths, police said.
Other police officers visited the home of the victims and picked up samples of the food they had eaten.
Meanwhile, three suspects were arrested in connection with the murder of an elderly woman in Moiben, Uasin Gishu county.
The body of Ruth Mutai, 88, was found lying by the fence behind her house with visible injuries.
Police said the body was found covered with a white sheet and a piece of firewood with blood stains was found next to it. It was moved to the mortuary pending an autopsy.
Police say they are holding three suspects in connection with the murder. The motive is believed to be a land dispute and more suspects are being sought, police said.
In Naivasha, one Daniel Njoroge Waweru aged 48, was buried alive by loose pumice stones after the walls collapsed.
The incident happened at Pumice Quarry in Kamole village along Longonot-Kenton-Fly over road.
The victim was in the company of other workers on August 1, when the incident happened.
Police with the help of other rescuers, managed to retrieve the body from the pumice.
The body was moved to the mortuary pending probe.
Elsewhere, a 48-year-old man was killed in a fire incident in Kwa Ndeti estate within Kwa Mangeli village, Athi River.
This is after his house was affected by a fire that broke out, police said.
The body of Justus Mutua Kimeu was discovered long after fire engines had contained the fire.
The cause of the fire is yet to be known, police said.