A man was arrested in Nyandaru on Wednesday afternoon on accusation of killing his wife.
Ol Joro Orok police boss Nyongesa Wanyama said the suspect is accused of attacking and hitting his wife while she was in a house.
Neighbours said the woman had moved out of her matrimonial home because of domestic violence to another house offered by a good samaritan.
The man is said to have ambushed his estranged wife and hit her on the head.
Neighbours took her to Nyahururu Referral Hospital where she was pronounced dead.
Mr Wanyama said investigation into the incident is ongoing.