Mr Walter Nyambati of Jubilee Party has filed a petition to challenge the victory of Nyamira Governor John Nyagarama.
Mr Nyambati, who lost to Mr Nyagarama in the August 8 elections claims the governor profited from breach of electoral law.
Through his lawyers Nyaencha Waichari and Company advocates, Mr Nyambati claims the election for the governor seat was marred with irregularities that favoured his opponent.
The petition was filed in the High Court in Nyamira. The Independent Electoral and Boundary Commission (IEBC), the County Returning officer David Kiprono Towett and Mr Nyagarama have been named as respondents.
Mr Nyambati accuses IEBC and Mr Towett of recruiting eight Nyamira County employees as returning officers, who in turn bungled election results in favour of Mr Nyagarama.