Mr Adebayo Adelabu, the governorship candidate of the All Progressives Congress (APC) in Oyo State, has filed a petition at the tribunal to challenge the victory of Mr Seyi Makinde of the Peoples Democratic Party (PDP) in the March 9 election.
Independent National Electoral Commission (INEC) had earlier declared Makinde winner of the governorship election after polling 515,621 votes to defeat Adelabu who had 357,982.
Other respondents in the case are the PDP and the Independent National Electoral Commission (INEC).
Investigation by on Tuesday at the secretariat of the Governorship Election Petition Tribunal. in Ibadan revealed that only Adelabu and his party filed a petition