A man was killed and several others injured on Wednesday in Mathare, during a fight between supporters of nominated Senator Elizabeth Ongoro and Ruaraka MP TJ Kajwang.
Ms Ongoro, who has expressed interest in Ruaraka parliamentary seat, had just completed a meeting with women at the Mandera Hall, when supporters of Mr Kajwang confronted her supporters.
"During the chaos, a 30-year-old man was stabbed in the chest and died as he was being taken to hospital," police say.
Another man was stabbed on the face and was treated at the Uzima White House Medical Clinic and discharged.
The body of the deceased was taken to Chiromo Mortuary.