Nairobi Governor Evans Kidero and Mike Sonko exchanged blows on Tuesday after the Senator accused him of being a murderer.
The incident took place during a session by the Senate Public Accounts Committee in which Kidero is answering audit queries for the 2013/2014 financial year.
Trouble started when Sonko made a presentation on land rates in Nairobi, which he said were illegal.
Sonko appeared as a friend of the committee to table documents on the rates.
Nyamira Senator Kennedy Mong'are interjected terming Sonko's presentation "extraneous" and said they were not backed by evidence.
Mong'are shot back: "Sonko, you cannot intimidate anyone here. The issues are extraneous and can be prosecuted elsewhere not in this venue."
Sonko retorted asking the Senator to take the "nonsense" to his county.
The two then engaged in an exchange during which Sonko banged the table and accosted Mong'are, saying he had "seen" the Governor.
Sonko claimed a woman in Nairobi was ejected from her Sh2 million property and "murdered by Kidero and his Chief of Staff Wainaina".
He tabled a form which he said showed how the property's ownership was transferred but the committee questioned its admissibility.
The Senator then shouted at Kidero saying: "He is a murderer and I cannot withdraw that. I have video clips to prove that and I have no apologies to make."
Sonko said he blocked a punch from Kidero.
The Governor walked out saying he would return to answer the audit queries in a conducive environment.
The session was adjourned until further notice.
possunt quia posse videntur